Siglent SDG 805 boot problem - Page 1
Forum section: electronics / testgear

author: gepposound
author_rank: Newbie
timestamp: December 08, 2014, 03:45:48 pm
content: Hi All !!!i have a problem with a brand new Siglent sdg 805that a bought in november.I used it 3-4 times without problem , but today i have problem in booting up the unit.when i press the power on button the device show in the display the siglent boot imagebut it stop with in that image .Does anyone have any ideas? Is the firmware corrupted ?Thanks

author: tautech
author_rank: Super Contributor
timestamp: December 08, 2014, 05:55:59 pm
content: Quote from: gepposound on December 08, 2014, 03:45:48 pmgepposoundYour SDG805 is still under Warranty.Please put your Country flag in your profile for recommendations for local repair.Where did you buy it?I will point Siglent to this post.

author: gepposound
author_rank: Newbie
timestamp: December 08, 2014, 06:34:59 pm
content: Thanks ,I live in Italy but i bought from futu-tech-shop (ebay shop) located in Hamburg.

author: tautech
author_rank: Super Contributor
timestamp: December 08, 2014, 06:50:50 pm
content: Quote from: gepposound on December 08, 2014, 06:34:59 pmThanks for posting a photo for forum memberSiglentto see.Siglent have a branch in Hamburg.info-eu@siglent.comI have emailed support at Siglent in China for you but it will be a few hours untill they are at the offices.

author: gepposound
author_rank: Newbie
timestamp: December 08, 2014, 08:51:32 pm
content: Thanks, i Will email Siglent distribuitor in Humburg.I Also did a research in the forum and i found that i canReset the Siglent scopes pushing the math button whenPowering up , but i didn't found nothing about the functionGenerators.

author: djnickthemix
author_rank: Newbie
timestamp: December 09, 2014, 04:11:53 am
content: Having the same problem with a new sdg3055 multimeter

author: Unknown
author_rank: Unknown
timestamp: December 09, 2014, 01:19:20 pm
content: Greetings!I just received the word that we have a firmware update coming on the SDM3055/3055A DMM.I apologize for the bug.Steve

author: gepposound
author_rank: Newbie
timestamp: December 09, 2014, 03:47:31 pm
content: So, do you think the problem of the sdg805 is related to a Buggy firmware ?If so there is a way to update it or flash it without using the software menù ?

author: Unknown
author_rank: Unknown
timestamp: December 09, 2014, 03:53:01 pm
content: Quote from: gepposound on December 09, 2014, 03:47:31 pmTo me it sounds like a defective unit as opposed to a firmware issue.I will contact Siglent EU and CC the factory to contact you.Regards,Steve

author: DC912
author_rank: Contributor
timestamp: December 16, 2014, 04:52:51 pm
content: My SDG 805, which is also new and has been turned on only a few times, has the same problem--on power up a message reading "kernel starting" appears, stays on the screen and the unit hangs at that point. Was the OP's problem resolved, and how? Thanks.

author: tautech
author_rank: Super Contributor
timestamp: December 16, 2014, 07:40:07 pm
content: Quote from: DC912 on December 16, 2014, 04:52:51 pmWhat country are you in and where did you buy?Do you have a local Siglent agent?Contact them or Siglent.Keep us posted on your problem.

author: gepposound
author_rank: Newbie
timestamp: December 16, 2014, 08:42:36 pm
content: Thanks to Everybody ,The problem is related to the hardware , it seems to be a defective unit .Anyway , Siglent offered me a new unit that has been already shipped from Germany.The customer service at Siglent is fantastic , i've been contacted from Siglent Usa, Siglent Europe and Siglent in China !!!

author: DC912
author_rank: Contributor
timestamp: December 18, 2014, 03:52:35 am
content: I am in the U.S. The generator was purchased new on ebay. I'll contact Siglent here. I was hoping to hear of a simple fix but it seems no such luck this time. Thanks much for the replies.

author: tautech
author_rank: Super Contributor
timestamp: December 18, 2014, 03:59:21 am
content: Quote from: DC912 on December 18, 2014, 03:52:35 amYou could PM Steve, EEVblog member Siglent USA a few posts above.

author: Siglent
author_rank: Regular Contributor
timestamp: January 16, 2015, 07:15:27 am
content: Siglent released the new firmware for SDG800 series arbitrary waveform generator. You can update your generator now. Click here:http://siglentamerica.com/gjjrj-xq.aspx?id=1231&tid=15&hmsr=eevblog&hmmd=&hmpl=&hmkw=&hmci=

author: rf-loop
author_rank: Super Contributor
timestamp: January 16, 2015, 07:55:00 am
content: It think it is good to note, even when there is "readme" file in package.It is important to follw special instruction because this is not as usual Siglent update process.It NEED first update special transition update between previous and new version.Readme.txt:Quote

author: Siglent
author_rank: Regular Contributor
timestamp: January 16, 2015, 09:19:28 am
content: Thank you!@rf-loop

author: wilgil
author_rank: Contributor
timestamp: January 19, 2015, 07:28:22 pm
content: After the firmware update the ability to carry out a self calibration has disappeared. Any comments Siglent? Was it not really needed?

author: jeremy
author_rank: Super Contributor
timestamp: January 10, 2017, 05:51:22 am
content: I'm having this problem now, I haven't used my 805 in a while so I'm pretty sure it is out of warranty. I can't install the firmware update, because it is stuck on the splash screen so I can't get to the update menu. Is there a way around this?

author: tautech
author_rank: Super Contributor
timestamp: January 10, 2017, 06:27:26 am
content: Quote from: jeremy on January 10, 2017, 05:51:22 amContact Trio in AUS or did you bring it in from overseas ?Contact details:http://www.siglent.com/ENs/lxwms.aspx?id=616They've got a 3 year warranty and the build date can be estimated by the #'s preceding the last 4 in the serial #.All SDG800models need to updated to P12R2 firmware to avoid boot fail problems:http://www.siglentamerica.com/gjjrj-xq.aspx?id=4760&tid=15Siglent informed.

author: jeremy
author_rank: Super Contributor
timestamp: January 10, 2017, 06:33:11 am
content: I bought it near mint second hand. Would have only been used a few times by the previous user (if at all). I'm not 100% sure where it came from originally, but the warranty void sticker is still intact.digits before the last four are "0000214", is this Feb 2014?

author: tautech
author_rank: Super Contributor
timestamp: January 10, 2017, 06:39:35 am
content: Quote from: jeremy on January 10, 2017, 06:33:11 amYep, as I understand it. Maybe 2nd production run 2014.

author: jeremy
author_rank: Super Contributor
timestamp: January 10, 2017, 06:42:42 am
content: Is there no way to put this unit into DFU or something like that? Attach a JTAG or something? (I know the answer is probably no, but I figured I would ask anyway)I'm pretty low on funds at the moment (between work), and shipping this thing to Trio is probably going to cost me a bitand looks like if I don't do it now, I'll be out of warranty in two weeks.

author: tautech
author_rank: Super Contributor
timestamp: January 10, 2017, 06:49:26 am
content: Quote from: jeremy on January 10, 2017, 06:42:42 amDon't fret, it's been reported a few minutes ago so just let the processes be worked through.Trio may handle the paperwork but your local dealer might do the repair that usually consists of a replacement mobo.For the time being please don't be tempted to touch it.Your location ?

author: jeremy
author_rank: Super Contributor
timestamp: January 10, 2017, 08:44:43 am
content: I'm in Brisbane, QLD. I'll refrain from breaking out the screwdrivers

author: tautech
author_rank: Super Contributor
timestamp: January 10, 2017, 08:58:19 am
content: Use Trio's contact page and you might get PM's from some others too, watch for them.https://www.triotest.com.au/store/contact-us

author: tautech
author_rank: Super Contributor
timestamp: January 12, 2017, 10:48:00 am
content: Quote from: jeremy on January 10, 2017, 08:44:43 amHow are you making out with this Jeremy ?

author: tivoi
author_rank: Contributor
timestamp: June 08, 2018, 01:03:54 am
content: hi, i have same prolemt with shs806i'm in vietnam, have any service in vietnamhttps://youtu.be/gvidRXNwZVw

author: tautech
author_rank: Super Contributor
timestamp: June 08, 2018, 10:17:00 am
content: Quote from: tivoi on June 08, 2018, 01:03:54 amI've contacted Siglent for you.

author: svef
author_rank: Newbie
timestamp: September 06, 2018, 07:35:53 pm
content: So, I bought my SDG805, also from Futu Tech GmbH, back in 2014 and used it a bit in the beginning. Have then had a couple of years where my electronics workbench has been mostly collecting dust. Tried using it a couple of weeks ago and got stuck on the boot screen.I guess I'm screwed. It is definitely more than three years old.

author: rf-loop
author_rank: Super Contributor
timestamp: September 06, 2018, 07:51:12 pm
content: Quote from: svef on September 06, 2018, 07:35:53 pmContact Siglent.There is solution.Do you have installed FW version what support recovery using USB flash. (I guess not if I think your timeline)If you have this, then it is perhaps more easy. (if your SDG failure is this known type)If not, there is still solution (including some nice bonus) but it need open SDG and hardware activate recovery mode and then run recovery what need special file from Siglent and after recovery then remove this hardware activation.It have many times told that it is very important update to FW version what support USB recovery.And also now, if anyone still have SDG800 model with OLD FW then URGENTLY update it to version what supprt USB recovery.Not only support USB recovery but also more new FW do not go to thiss situation so easy at all afaik.

author: ratmole
author_rank: Contributor
timestamp: February 26, 2021, 08:40:09 am
content: Hi,is there a recovery image for SDG 805 available?need it to recover from stuck logo in boot.thanks

author: tautech
author_rank: Super Contributor
timestamp: February 26, 2021, 08:44:21 am
content: Quote from: ratmole on February 26, 2021, 08:40:09 amGot your PM and returned.Will go to emails.

author: jan141282
author_rank: Newbie
timestamp: June 29, 2021, 02:28:19 pm
content: Quote from: tautech on February 26, 2021, 08:44:21 amSame Problem here can you help me?

author: kucykmar
author_rank: Newbie
timestamp: August 15, 2021, 11:36:11 pm
content: Same problem. Could you help me too?

author: FlipZ
author_rank: Newbie
timestamp: November 03, 2021, 01:29:23 pm
content: I have exactly the same problem with my SDG805 since yesterday. Can you please send me the recovery too?Thanks!

author: tautech
author_rank: Super Contributor
timestamp: November 03, 2021, 02:04:32 pm
content: Quote from: FlipZ on November 03, 2021, 01:29:23 pmWelcome to EEVblog.PM sent.

author: krupka
author_rank: Newbie
timestamp: November 03, 2021, 02:15:32 pm
content: Hello, I begin to experience bootloop problem with my out of warranty Siglent SDG805.Could you please send me necessary files.Much thanks, you are lifesaver

author: FlipZ
author_rank: Newbie
timestamp: November 03, 2021, 03:55:28 pm
content: Quote from: tautech on November 03, 2021, 02:04:32 pmThanks for your quick reply and after having to retry the procedure many times it finally worked.All is looking good again. Many thanks !

author: rducky
author_rank: Newbie
timestamp: November 18, 2021, 04:19:04 pm
content: I am running into the same issue. Unit worked fine last night, this morning it is stuck at the boot logo. Can anyone share the recovery image?

author: voytec
author_rank: Newbie
timestamp: November 03, 2022, 11:45:06 am
content: Same problem. Could you help me too?Could you please send me necessary files.Much thanks.

author: DC912
author_rank: Contributor
timestamp: December 31, 2022, 03:27:40 am
content: Hello. My SDG805 now freezes on power on at a blue screen—it doesn’t get to the logo screen. The unit was serviced at Siglent several years ago. I would appreciate receiving the files to see if they might correct the problem. Thanks

author: wattberry
author_rank: Newbie
timestamp: February 27, 2023, 03:49:31 pm
content: I switched on my sdg 805 (production date 2017, software in delivery state) yesterday and recognised the same boot problem as described above. This device worked properly well in the past. I would appreciate, if someone could help me with instructions, files or any other documents. Thank you.

author: Fryguy
author_rank: Regular Contributor
timestamp: April 11, 2023, 09:27:28 pm
content: S*!T , i'm the next one . . .Can someone be so nice and send me the necessary files and info so i can fix my brick ?Thanks for your help !

author: tautech
author_rank: Super Contributor
timestamp: April 13, 2023, 10:23:26 pm
content: Quote from: Fryguy on April 11, 2023, 09:27:28 pmReceived your PM, now check the one from me !

author: tautech
author_rank: Super Contributor
timestamp: April 21, 2023, 07:12:18 pm
content: Quote from: Fryguy on April 21, 2023, 06:57:47 pmPlease return email about what you have done.

author: MarcoM_89
author_rank: Newbie
timestamp: May 03, 2023, 09:05:26 am
content: Hello, same problem with sdg830 after updating from V1.08.01.15_EN to V1.08.01.15R2_EN. Any solution?

author: Raz
author_rank: Newbie
timestamp: September 10, 2023, 01:00:53 am
content: Can anyone send me the instruction on how to fix a Siglent SDG 805 stuck on boot problem.Thanks.

author: tautech
author_rank: Super Contributor
timestamp: September 10, 2023, 01:02:40 am
content: Quote from: Raz on September 10, 2023, 01:00:53 amWelcome to the forum.PM your email address and we'll have you all fixed up.

author: Raz
author_rank: Newbie
timestamp: September 10, 2023, 02:44:47 pm
content: "Device recovery by USB flash drive", not working for this unit. It stays stuck at Siglent startup screen indefinitely with Kingston or Sandisk 8Gigflash drive.

author: tautech
author_rank: Super Contributor
timestamp: September 10, 2023, 07:50:17 pm
content: Quote from: Raz on September 10, 2023, 02:44:47 pmWhat did my email say, report the outcome to me !We have other ways and we need discuss details via email.

author: KungFuJosh
author_rank: Super Contributor
timestamp: September 10, 2023, 08:47:59 pm
content: Quote from: Raz on September 10, 2023, 02:44:47 pmTry downloading"SD Card Formatter"and format both SD cards with that utility, and try again.

author: tautech
author_rank: Super Contributor
timestamp: September 10, 2023, 08:57:46 pm
content: Quote from: KungFuJosh on September 10, 2023, 08:47:59 pmPlease butt out Josh as we have several ways to recover these but we try the simplest methods first to gauge the skill of the owner.It can be quite complex for some so we hold their hand so to get a good result.

author: Raz
author_rank: Newbie
timestamp: October 03, 2023, 04:10:55 pm
content: Just got repaired today after a chat with a Siglent support tech.

author: bartopesto
author_rank: Newbie
timestamp: November 12, 2023, 03:26:28 pm
content: I must add my name to the list... I own a SDG805 since many years (out of warranty); today I tried to update the firmware from SDG800_V100R008B01D01P08 (which worked) to the last version, SDG800_V1.08.01.15R2. Even though I followed the instructions to the letter, the machine went into bootloop when it automatically restarted at the end of the update. It is now locked at the "Siglent" splash screen. May I have the recovery image to put in the USB key? If necessary I can also open and tamper with the circuits (but I'd rather not). I'm sending a PM with my e-mail to tautech, just in case... Thanks in advance!

author: rf-loop
author_rank: Super Contributor
timestamp: November 12, 2023, 05:51:42 pm
content: Quote from: bartopesto on November 12, 2023, 03:26:28 pmYour version was really very old V100R008B01D01P08As you can see it is not included even version history pdf (included inside update zip)If I remember right it can not update directly from this extremely old version. It may need first intermediate update.(sad there is not list of compatible FW versions list, but when user see his current FW is not even listed in new version update package "version history" it is good signal to user that first is good to ask before update... )But now it is late for this because its status is now as you told...I am quite sure, after this failure, it need now SD card recovery. For this there need do also some simple SMD rework (before SD recovery and then return changes back to original. Enough bad mistakes there and it is electronics recycling stuff. But when all is done carefully ok, it is quite robust way to Recover. There is instructions in recovery package including also Hewlett-Packard tool for do SD card formatting.)

author: bartopesto
author_rank: Newbie
timestamp: November 13, 2023, 08:42:03 am
content: Thank your for your answer.Yes, my version was pretty old, but the installation instructions of the latest version (V1.08.01.15R2) say that:> If the firmware version in your SDG800 is after 1.08.01.08 (included), please install the latest ADS file directly.I would be glad to try the SD card recovery procedure (a non-booting generator is totally useless!), but cannot find in the siglent site (nor anywhere else) the SD "recovery package" with instructions you mentioned. May you point me in the right direction?

author: tautech
author_rank: Super Contributor
timestamp: November 13, 2023, 10:06:01 am
content: Quote from: bartopesto on November 13, 2023, 08:42:03 amBy email please.

author: rf-loop
author_rank: Super Contributor
timestamp: November 13, 2023, 10:13:27 am
content: Quote from: bartopesto on November 13, 2023, 08:42:03 amYes I was looking some one my old case and yes in new documentation this is also well explained by Siglent. Updated now in my old head too.You need SD recovery package with all instructions.It is not public share. PM me or @tautech here and after then email.ETA: oh yes tautech was fast...

author: bartopesto
author_rank: Newbie
timestamp: November 14, 2023, 04:18:59 pm
content: I have been able to recover the full functionality of my SDG805 with the SD card recovery procedure. Many thanks to tautech who provided files and instructions, and to rf-loop for useful advice.

author: HamUser
author_rank: Newbie
timestamp: February 14, 2024, 07:18:00 pm
content: Good evening,I also have the problem with the "Kernel Starting..." in the display.... on a Siglent SDG 830.I would be very grateful for any help.Best regards,Daniel

author: tautech
author_rank: Super Contributor
timestamp: February 14, 2024, 07:24:41 pm
content: Quote from: HamUser on February 14, 2024, 07:18:00 pmWelcome to the forum.Send us PM with your email and I'll be in touch.

author: free71xu
author_rank: Newbie
timestamp: March 08, 2024, 08:22:10 am
content: Hello everyone,I'm uncertain if my SDG810 is experiencing the same boot issue. It appears to boot to the normal screen, but none of the function buttons respond despite being lit up. Interestingly, when I plug or remove the USB disk, it recognizes the disk and emits a beep. I've tried using the USB recovery software provided by Siglent, but it doesn't seem to have any effect. I purchased this unit around 2016, and I'm unsure of the firmware version as it freezes before verification. Is there any way to recover it?Thank you in advance,

author: chrzaszcz
author_rank: Newbie
timestamp: June 19, 2024, 02:59:46 pm
content: Hello everybody.I also have boot freeze problem with SDG805. I bought it new in 2015 in Poland. It hasn't been used since 2015. So I'm sure it has some very old firmware.Part of serial number is 0413xxxx. Can you help me fire it up? I asked local Siglent distributor about solution, didn't get the answer.With help from tautech and this thread I recovered and updated my SDG805.Thank you.

author: areksadow
author_rank: Newbie
timestamp: August 05, 2024, 09:17:10 am
content: HelloI have a problem with my SDG805 generator. I need SD recovery package.Thank you in advance for your help.Regards

author: tautech
author_rank: Super Contributor
timestamp: August 05, 2024, 09:39:55 am
content: Quote from: areksadow on August 05, 2024, 09:17:10 amWelcome to the forum.Check your messages.

author: duster
author_rank: Newbie
timestamp: August 06, 2024, 03:46:59 pm
content: hello，i am form china and i got a second hand SDG805, but it can't work, stopped at the start logo.I found the solution on the eevblog, may i get a repair FW and method form you?Thanks very much, good luck!

author: duster
author_rank: Newbie
timestamp: August 20, 2024, 11:24:48 pm
content: hello，i am form china and i got a second hand SDG805, but it can't work, stopped at the start logo (even i use the repair FW form SIGLENT).I found the solution on the eevblog, may i get a repair FW and method form you?Thanks very much, good luck!

author: tautech
author_rank: Super Contributor
timestamp: August 20, 2024, 11:42:11 pm
content: Quote from: duster on August 20, 2024, 11:24:48 pmCheck your messages.

author: DanilaCh
author_rank: Newbie
timestamp: September 04, 2024, 01:35:55 pm
content: Hello everyone,I have SDG830 and it has the same problem. It stuck on bootCan anyone send me the instruction on how to fix this problem.Thanks.

author: sardaukar1618
author_rank: Newbie
timestamp: December 23, 2024, 10:37:54 am
content: hello,I wanted to upgrade my SDG 805 to prevent boot problem.My version was after 1.08.01.08 so I installed the latest ADS file directly (V1.08.01.15R2_EN ).It is now not starting (boot loop on Siglent screen)Could you please send me the recovery file and procedure ?thanksRegardsStephane

author: sardaukar1618
author_rank: Newbie
timestamp: December 27, 2024, 08:37:48 am
content: Quote from: sardaukar1618 on December 23, 2024, 10:37:54 amHello everybody,Just a quick follow up to thanktautechwho helped me to recover my almost 10 years old SDG 805 !I am so happy to know this forum and helpfull peoples !Have a nice dayStephane

author: bradley0574
author_rank: Newbie
timestamp: January 19, 2025, 06:23:28 am
content: I have the same problem with my newly boughted secend hand SDG830.I tried to upgrade to 1.08.01.15R2 from 1.08.01.08 directly, but it halted after upgrading.Can you send the recovery package to me? Many thanks!

author: bradley0574
author_rank: Newbie
timestamp: January 20, 2025, 11:28:55 am
content: With the help of tautech, my SDG830 come back to life.I'm really appreciate for your help@tautech, thank you!

author: nick_spse
author_rank: Newbie
timestamp: February 06, 2025, 01:01:29 pm
content: Hello, I have nine Siglent SDG805 generators at school, but none of them are working. Based on what I’ve read on this forum, I believe the issue is exactly as described – they haven’t been powered on for many years. Could I ask for help? I need the recovery files for restoration via an SD card.Thank you very much in advance.

author: R-1125F
author_rank: Regular Contributor
timestamp: March 01, 2025, 04:27:21 pm
content: I just got an SDG805 that does not boot past the Siglent splash screen. I guess I also need the recovery software.

author: R-1125F
author_rank: Regular Contributor
timestamp: March 01, 2025, 10:06:39 pm
content: Tautech sent me the files I needed to recover. It is now back in operation. Many thanks.

author: tautech
author_rank: Super Contributor
timestamp: March 01, 2025, 10:19:53 pm
content: Quote from: R-1125F on March 01, 2025, 10:06:39 pmNo worries.In a unit that old and with unknown firmware update history you were lucky it had been updated to support the simple USB recovery.

author: Decran
author_rank: Newbie
timestamp: March 06, 2025, 01:14:12 pm
content: Hello,I encountered the same situation. I updated my SDG830 from 1.08.01.08 to V1.08.01.15R2, just following the instruction manual. But it cannot boot now (loop-booting).May I ask for the recovery files? Thank you so much!Best,Decran

author: minifloat
author_rank: Contributor
timestamp: March 13, 2025, 12:48:48 am
content: Hello everyone,I have an RS-components RSDG305 which from specs and looks, is a rebranded Siglent SDG830. Funny thing though, no fan?Same issue as @free71xu has seen:Quote from: free71xu on March 08, 2024, 08:22:10 amIt first looked like the -24V was loaded down to -15V and after the regulator only -14.5V Hm...After disassembly, cleaning the button board (brass swarves in flux residue? not cool), then reseating all connections, voltages now measure all good according to service manual. +1.2V bit on the high side but within 10%.Though, behavior is still same.USB device/client connection seems ok, it enumerates, so the system must be running to some extent. USB Host, not tested yetCurious whether I can rescue this unit, will write a PM to @tautech.br, mf

author: minifloat
author_rank: Contributor
timestamp: March 13, 2025, 05:19:49 pm
content: Hi again,@tautech responded quickly. Thanks!The keyboard issue is NOT related to the boot problems.[edit: somehow it is ... see later posts]Will try buzzing out the ribbon cable an try controlling the instrument via USB.br, mf

author: phillsky@gmail.com
author_rank: Newbie
timestamp: March 21, 2025, 01:53:07 pm
content: Yup me to. Hangs on the Siglent splash screen. Need some help to get it going again.

author: tautech
author_rank: Super Contributor
timestamp: March 21, 2025, 06:49:32 pm
content: Quote from: phillsky@gmail.com on March 21, 2025, 01:53:07 pmWelcome to the forum.The chaps at Siglent EU HQ have the SDG800 recovery tools you need.info-eu@siglent.com

author: minifloat
author_rank: Contributor
timestamp: March 29, 2025, 10:17:41 pm
content: Hello again,TL;DR the USB recovery helped, also in case of "boots up, but buttons dead"version with pics below.Overall the symptoms were very confusingto me.Voltages were ok (besides sometimes the -24V sagging to -15V), compared to service manual and what this guymeasured (see attached SDG800 Voltages.xlsx if you want to compare). I pulled out the Power suppy PCB and inspected the -24V electrolytic caps, whether they bulge or something. Nope. Also my LCR meter in low-level test voltage mode did not show suspicious things.The ribbon cable was ok, seated and isolated on the desk. The logic ICsHC595 ... HC393 ... HC4051Drelated to buttons and LEDs did just receive static signals.All LCD signals were showing lots of activity (see attached flatflex_meas.xlsx)USB host works, the SDG beeps and displays a message, when inserting an USB stick.USB device works, it enumerates and EasyX software is able to connect.I got desperate and soldered on a serial console port, like herehttps://41j.com/blog/2016/08/hacking-around-with-a-sdg800-sdg805/img_0430/hoping for some self-diagnosis output. Then capturing boot logs and compare to the log on that site. Boot with display. Boot without display. Boot with fast power cycles, hoping to see the -24V problem again. Once I did. No significant differences to the online source. My own bootlogs without any difference besides the timestamps.Conclusions so far, at least the Main CPU was booting and running fine.At this point I noticed, the FPGA heartbeat LED was _not_ blinking.Spurious hardware problem?@tautech meanwhile replied with some files and instructions.And they worked. Would have even worked without taking it apart and all things above. Funny thing though, I haven't seen the -24V drop since...Thanks again @tautech and I hope this post will help someone out there.br, mf

author: kopi@ces2000.hu
author_rank: Newbie
timestamp: April 24, 2025, 10:00:54 am
content: Hi!I have same problem with my SDG805, after firmware update from V1.08.01.08 to V1.08.01.15R2 . I need SD recovery package.Thank you in advance for your help.

author: tautech
author_rank: Super Contributor
timestamp: April 26, 2025, 08:36:03 pm
content: Quote from: kopi@ces2000.hu on April 24, 2025, 10:00:54 amWelcome to the forum.Got your PM requesting the SD card recovery package.....have you first tried the much simpler USB recovery package ?The chaps at the Siglent EU HQ have the SDG800 recovery tools you need.info-eu@siglent.com

author: kopi@ces2000.hu
author_rank: Newbie
timestamp: April 28, 2025, 11:45:50 am
content: Thanks for the answer!I haven't tried the usb recovery package. Where can I get it?I tried contacting the EU distributor via the email provided, but they didn't respond.Thank You!

author: tautech
author_rank: Super Contributor
timestamp: April 28, 2025, 08:42:11 pm
content: Quote from: kopi@ces2000.hu on April 28, 2025, 11:45:50 amAny contact from Siglent EU HQ yet ?You might also try via their contact form:https://www.siglenteu.com/contact-us/

author: tautech
author_rank: Super Contributor
timestamp: May 02, 2025, 05:45:48 pm
content: Quote from: kopi@ces2000.hu on April 28, 2025, 11:45:50 amFollowed up on this....EU HQ has replied to you, days ago so check your Spam folder.

author: kopi@ces2000.hu
author_rank: Newbie
timestamp: May 04, 2025, 06:49:33 am
content: Quote from: tautech on May 02, 2025, 05:45:48 pmIt was indeed sent in the SPAM.Thanks for the help, the generator is working again!

author: ben1299
author_rank: Newbie
timestamp: May 06, 2025, 06:10:19 am
content: Hi have this same issue too where by its stuck at siglent logo,can i have the USB recovery or micro SD recovery guide and file ?RegardsBenjamin Tan

author: tautech
author_rank: Super Contributor
timestamp: May 06, 2025, 06:51:31 am
content: Quote from: ben1299 on May 06, 2025, 06:10:19 amWelcome to the forum.Siglent HQ is your nearest point of contact.Drop them mail and they will get you fixed up.support@siglent.com

author: ben1299
author_rank: Newbie
timestamp: May 07, 2025, 08:12:18 am
content: I have just drop them an email waiting for a reply hopefully I can fix this.

author: ben1299
author_rank: Newbie
timestamp: May 08, 2025, 08:06:34 am
content: Thank you again for the email. SDG805 back in action!

author: zhenwenjing
author_rank: Newbie
timestamp: May 10, 2025, 05:22:58 am
content: Hi，Im new here. I have a SDG805, cant boot.I need the sdcard recover package.How can i get it？thanks

author: tautech
author_rank: Super Contributor
timestamp: May 10, 2025, 07:49:16 am
content: Quote from: zhenwenjing on May 10, 2025, 05:22:58 amWelcome to the forum.How can you know you need the SD card recovery package ?Did USB recovery not work ?Siglent HQ is your nearest point of contact.Drop them mail and they will get you fixed up.support@siglent.com

author: zhenwenjing
author_rank: Newbie
timestamp: May 10, 2025, 03:34:43 pm
content: Yes, USB recovery not work.The boot always stays on the white interface and keeps restarting.I'm sorry, my device is a second-hand device that has been out of warranty.So I would like to request the SD card recovery package.Thanks.

author: tautech
author_rank: Super Contributor
timestamp: May 10, 2025, 08:00:08 pm
content: Quote from: zhenwenjing on May 10, 2025, 03:34:43 pmAs before, contact Siglent HQ and explain your problem.You can communicate with them in Chinese if you prefer.

author: ShieldsExperiments
author_rank: Newbie
timestamp: June 16, 2025, 09:04:07 pm
content: Howdy, long time lurker, new member.I've also got an SDG 805 with a no function boot. It gets past the splash screen but no button responses. I've already contacted Siglent support for the USB recovery tool, but unfortunately it didn't change anything. Unknown firmware version, likely quite old as I got the unit for repair a while back. It does splash "A USB flash drive has been detected" and the drive was (a 1gb unit - I've heard that matters) FAT32 formatted blank before I tried it.I think this means it needs the SD card repair, not sure.Thanks for any help

author: tautech
author_rank: Super Contributor
timestamp: June 16, 2025, 10:09:35 pm
content: Quote from: ShieldsExperiments on June 16, 2025, 09:04:07 pmWelcome to the forum.As it gets past boot and any SD card recovery would entail opening it, you should first check all the test points in the Service manual.https://int.siglent.com/u_file/document/SDG800%20Service%20Manual.pdf

author: ShieldsExperiments
author_rank: Newbie
timestamp: June 17, 2025, 07:30:07 pm
content: Thanks for the manual; everything checks out good, regulated voltages are just about spot on, -20 rail reads a little hot at -23, but that's in tolerance, and there's a nice clean 25MHz coming off of Y1 Pin3. I think it just needs firmware.

author: tautech
author_rank: Super Contributor
timestamp: June 17, 2025, 08:59:29 pm
content: Quote from: ShieldsExperiments on June 17, 2025, 07:30:07 pmSounds good.Quote from: ShieldsExperiments on June 16, 2025, 09:04:07 pmEarliest SDG800 could not be recovered via the USB recovery tool as the firmware at that time did not support it.SD card recovery then becomes your only option.If you hunt through the firmware version notes the version and release date that supports USB recovery is listed and any versions prior must use SD card recovery to get these units running again.It's a bit complex but successful when the instructions are followed to the letter.Pop the chaps at Siglent NA another message requesting the SD card recovery package.To convince them you require it add the SN# to your email.Good luck.

author: ShieldsExperiments
author_rank: Newbie
timestamp: June 17, 2025, 09:30:08 pm
content: I'll try that again, but I'm not too optimistic - they told me it'd have to be sent in to them (Siglent NA) for repair at a rather large fee once I said that the USB recovery was unsuccessful. The unit itself offers no indication what firmware version it's (unsuccessfully) running on, so unfortunately I've got nothing to go off of in that regard.

author: tautech
author_rank: Super Contributor
timestamp: June 17, 2025, 09:33:39 pm
content: Quote from: ShieldsExperiments on June 17, 2025, 09:30:08 pmTry Siglent HQ instead:service@siglent.comThey won't be on deck for a few hours yet (Shenzhen time) and give them the SN# and some history about your unit.

author: Coral
author_rank: Newbie
timestamp: July 19, 2025, 08:01:01 pm
content: Hello minifloatI reached this post looking for help.I also have one SDG 805 with same issue.I have only used it a few times since I bought it many. It has been stored some years and now when powering on seems to boot as it shows waveform screen but all buttons are dead. Buttons keep lighted. Rotary encoder is also dead. Pendrive in the front USB is detected and EasywaveX connects.Can you send me the files and instructions @tautech sent you?And explain me what you did to recover the unit?Best Regards,Coral

author: tautech
author_rank: Super Contributor
timestamp: July 19, 2025, 09:27:50 pm
content: Quote from: Coral on July 19, 2025, 08:01:01 pmWelcome to the forum.Siglent in Germany is your closest point of contact:https://www.siglenteu.com/contact-us/Tell them as much as you can, SN# and if the unit has ever had a FW update.Tell us the outcome.

author: Coral
author_rank: Newbie
timestamp: July 26, 2025, 10:10:27 am
content: Good morning,I contacted with Germany and they sent me the "SDG800 series system recovery by SD card.zip" packI followed the procedure and it worked!!Device got "Software Version: 1.08.01.13R5" and it has become to live again . FPGA led flash again, keypad works again and signal output is rightAlso tried to make further firmware upgrade with pendriveThis oneSoftware Version: 1.08.01.15R7Hardware Version_ 02-00-00-15-00Model: SDG830doesn't allow calibration, option disappearedI guess it is because is intended for a further hardware versionI downgraded toSoftware Version: 1.08.01.13R9Hardware Version_ 02-00-00-10-00Model: SDG830Serial Number: SDG0which might be the last one suitable for my deviceFinal guess, reading firmware revision history is that I have suffered the bug causing generator never start up because hardware is ok3/21/2018 1.08.01.13R5It is strongly recommended to update to the latest release because in some previous release exists some serious bug which could cause the generator never startup1. Supported system recovery from the U-disk2. Supported Rev.C hardware with Over Voltage Protection6/7/2016 1.08.01.12R2Fixed several bugsa) A bug in P12R1 which could cause the update to failb) Some typo in English help system3/7/2016 1.08.01.12R1Fixed several bugsa) A bug in file system could cause the generator never startupb) Can not wake up from screen saver from time to time11/9/2015 1.08.01.111. Re-open the self-calibration function2. Fixed a bug which may cause the generator can not startup3. Fixed several other bugs

author: tautech
author_rank: Super Contributor
timestamp: July 26, 2025, 07:31:30 pm
content: Do whatever adjustments you must then update to V1.08.01.15R2https://int.siglent.com/upload_file/zip/firmware/Signal_generator/SDG800_V1.08.01.15R2_EN.zipWhy ?Look at the release notes:Fixed the bug that startup occasional failuresFixed the bug of burst sync output exceptionFixed the bug that may not output when switch the waveform after the burst is turn off

author: sancat
author_rank: Newbie
timestamp: September 25, 2025, 05:14:38 pm
content: helloMy SDG805 also encountered the problem of getting stuck at the logo during startup. I found out in a blog that it might be a firmware issue. I would like to ask for your help with the firmware recovery package.Thank you very much! best wish！