Tektronix TDS5054B Little ribbon in top leftt Screen ALL LEDs Lit FP-No Boot - Page 1
Forum section: electronics / repair

author: denimdragon
author_rank: Regular Contributor
timestamp: December 21, 2017, 07:17:13 pm
content: Ok, so I have this 5054B. I am wondering a few things. First is there a reset jumper somewhere on the PPC Board? These have no drive with them so I am having to reinstall everything. I attached a hdd preloaded with the Win2000 and the necessary software but it won't get past this little ribbon screen. It boots and shows the Tek splash screen, then goes to the black screen with the little blue ribbon looking icon in the top left. I was hoping that this was just a reset issue on the PPC board side. Any info would be greatly appreciated. Thanks in advance. Pics below.

author: denimdragon
author_rank: Regular Contributor
timestamp: December 21, 2017, 10:17:46 pm
content: Also does anyone know what this chip does? It's on the ATX board so I'm assuming that it is related to matching the hdd drive to the motherboard. Thanks in advance!

author: TiN
author_rank: Super Contributor
timestamp: December 21, 2017, 11:06:04 pm
content: That chip in socket is the BIOS EEPROM. It's not related to harddrive.Take a photo of area around CPU, let's see health of the VRM there.What looks like that you have problem with your x86 PC side in the scope, as that human icon is Award BIOS logo, which is part of BIOS welcome screen.So your PC does not boot far enough to draw all the stuff like CPU info, memory size, etc.High chances there are power issues in the scope (PSU, VRMs on the x86 motherboard).

author: denimdragon
author_rank: Regular Contributor
timestamp: December 21, 2017, 11:24:46 pm
content: Quote from: TiN on December 21, 2017, 11:06:04 pmHey TiN. Good to know. Also, both of the scopes have the exact same icon when I try to boot them so it would be great if they both have the same issue (if its a simple fix). I'm off to take the pics.

author: denimdragon
author_rank: Regular Contributor
timestamp: December 22, 2017, 12:03:17 am
content: That's the VRM to the left with the heat sink I'm assuming? The caps seemed leaky at first, but it turns out that it was dust that collected over time from the CPU heat sink. I have an in-circuit ESR meter so I'm going to check the values for these.Let me know if you need better pictures. I can upload them to my server.

author: TiN
author_rank: Super Contributor
timestamp: December 22, 2017, 12:13:54 am
content: All those capacitors around CPU must go. Write down their capacitance, voltage and got replacements from Digikey/etc (search for Low ESR +105c caps, with same size).Replace the caps. Chances are ~70% that it will be all fixed after this

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: December 22, 2017, 12:48:04 am
content: That ribbon looks like the Award BIOS logo.... So either someone borked a firmware update, and/or yes, the capacitors should be replaced.

author: denimdragon
author_rank: Regular Contributor
timestamp: December 22, 2017, 01:06:47 am
content: Quote from: TiN on December 22, 2017, 12:13:54 amAwesome! I have a local shop 5 miles from me that has all the goodies, so I might be able to pick them up tomorrow. They are Chemicon TMV series, but I couldn't find any data for them online.Quick question for you. I know you have worked on these (I snoop around your site all the time) before and these have the serial B06XXXX on both. What do you think about their performance when it comes to speed? I might (I'm a TE hoarder also) keep one and get rid of my my hacked Rigol DS1054Z (it's only 3 months old LOL). Then I'll have 2 boat anchors! Well these aren't as bad as my 784D.I also have an intel Core 2 Duo e6400 CPU that I'll probably use instead of the stock Celeron D. The E6400 smokes the Celeron performance wise.

author: denimdragon
author_rank: Regular Contributor
timestamp: December 22, 2017, 01:11:00 am
content: Quote from: Alex Eisenhut on December 22, 2017, 12:48:04 amA possible BIOS goof was the first thing that came to mine when TiN told me what the logo was. I just hope they didn't do it on both, and that it's just bad caps.

author: andy2000
author_rank: Frequent Contributor
timestamp: December 22, 2017, 03:19:30 pm
content: Quote from: denimdragon on December 22, 2017, 01:06:47 amYou will need to make sure the BIOS supports Core 2 CPUs. Many early 775 boards only work with P4 based chips. You can still still do a lot better than the original Celeron, and also max out the RAM. You could also replace the whole motherboard if you can find one with the same jack panel layout.

author: denimdragon
author_rank: Regular Contributor
timestamp: December 22, 2017, 04:57:26 pm
content: Quote from: andy2000 on December 22, 2017, 03:19:30 pmYou mean the 775 socket?

author: andy2000
author_rank: Frequent Contributor
timestamp: December 22, 2017, 05:05:17 pm
content: Quote from: denimdragon on December 22, 2017, 04:57:26 pmCorrect

author: denimdragon
author_rank: Regular Contributor
timestamp: December 28, 2017, 11:20:33 pm
content: Quote from: TiN on December 22, 2017, 12:13:54 amNailed it! I received the Nichicon replacements today from Mouser. These little caps are toast but when I checked them the ESR seemed ok, even though I couldn't find any datasheets for them. I know they are UCCs but nothing was available when I looked in terms of data online. Some had bad ESR (.17-.19ish) but most were reading .008-.04 range. Once I took a good look at them up close, I could see that the bottom had been pushed out. This was a great "rookie" experience for me understanding capacitor failure. If you had not told me to look there I would have never thought those guys were bad but being the anal retentive person I am I would have changed them out anyway, and I will most likely change out all the caps on this board after I get it to show more than the splash screen and that damned little ribbon!Another thing I want to ask is does anyone have a suggestion on dealing with the desoldering process on these caps? They are a PITA to remove so on the second motherboard some of the legs are still there. The first one I was patient with and after about an hour I was able to get all the caps off cleanly. But the 2nd one...I'm going to preheat the boards this time around and see if it helps make the clean up faster before I install the new caps. Pics belove of the old and the new. The new ones seem a bit pricey! $0.657 a piece. They did have Panasonics that were around .30ish but I'm not sure about reliability.

author: TiN
author_rank: Super Contributor
timestamp: December 29, 2017, 01:04:30 am
content: Good rule to follow on most of electronics repairs : if board is older than 10 years, caps must go. If area near caps stressed by high temperatures (typical when hot LDO or CPU nearby) : replace all caps that are older than 5 years. Life of the cap shortened twice with each +10c rise.Often (but not always) this is the only problem with power delivery circuitry in device. SMPS especially sensitive to input and output capacitance quality.

author: denimdragon
author_rank: Regular Contributor
timestamp: December 29, 2017, 03:47:47 am
content: Quote from: TiN on December 29, 2017, 01:04:30 amGood to know. I'm off to put it back together and see what happens

author: denimdragon
author_rank: Regular Contributor
timestamp: March 03, 2018, 11:39:36 pm
content: So I finally had the time to get back to this project (school is kicking my @$$ but I'm enjoying it). Thanks again to everyone for helping...So after fighting to get the original capacitors out and clean the board good, I was able to install the new caps. I have two of these scopes so I replaced the caps on both boards. The first ATX motherboard I tried showed the same initial problems so I moved to the next one and it booted. I installed all the software and it's passes all tests, but I have one very critical problem. No waveform shows up! I remember something similiar happening with the TDS 7154B I repaired, but I haven't a clue as to how I got the trace/waveform to show up (note to self to improve my logging/ note taking skills).@TiN , I saw on the site where you repaired/upgraded the TDS 5034B and I noticed that I didn't see any traces on the screen in your pictures. Maybe you can help me solve this as well?Everything else looks good. I've upgraded the RAM from 512mb to 2GB in order to help with boot times and app installation speed. Huge difference! I can't want to get past this trace/waveform issue so I can install a Core 2 Duo on this puppy. The Celeron is ok, but I want to max these scopes out with what I have available and I have a few C2Ds (from Apple motherboard repairs) hanging around and some old RAM that I thought I would never end up using. I'm so glad I didn't throw it away as I intended to intially.Any help would be greatly appreciated.

author: andy2000
author_rank: Frequent Contributor
timestamp: March 04, 2018, 04:56:57 pm
content: Make sure you have the Tektronix supplied video driver installed, not the one that comes with Windows.

author: denimdragon
author_rank: Regular Contributor
timestamp: March 05, 2018, 02:53:45 am
content: Quote from: andy2000 on March 04, 2018, 04:56:57 pmThe CHIPS driver right?

author: denimdragon
author_rank: Regular Contributor
timestamp: March 05, 2018, 05:31:58 am
content: Quote from: andy2000 on March 04, 2018, 04:56:57 pmThank you for the help guys. That driver install did the trick. We have a working scopeNow I'm going to work on the other scope after I run tests on this one again. I've ran the full diagnostic over 200 times with no failures except when I had the probe plugged inI also need to get into the BIOS because the fan on the CPU heat sink is on high all the time. I also had to replace the BIOS battery which is to be expected. Once I know that the other scope is good, I'll replace all the caps on the ATX motherboards and I'll also take a look at the power supply caps. I'll probably end up changing them anyway UNLESS it will upset something. Older Tek scopes seem to be tanks. Waveform pic below.

author: plazma
author_rank: Frequent Contributor
timestamp: March 05, 2018, 05:44:11 am
content: Did you run the SPC (signal path compensation)?

author: denimdragon
author_rank: Regular Contributor
timestamp: March 05, 2018, 01:29:36 pm
content: Quote from: plazma on March 05, 2018, 05:44:11 amYes, and it passes all those as well. Do you know of any extended tests other than those 2?

author: plazma
author_rank: Frequent Contributor
timestamp: March 05, 2018, 01:48:39 pm
content: No. I recently got a TDS7104 for free. It most of the time fails SPC. Last time fifth time was a PASS. We have some probe calibration and deskew fixture at work. I don't know if the same is available for your model.

author: denimdragon
author_rank: Regular Contributor
timestamp: March 05, 2018, 06:10:44 pm
content: Quote from: plazma on March 05, 2018, 01:48:39 pmI have to look into that. Thanks for the info. Along with help from everyone here I was able to bring a TDS7154B back to life but channel 4 had issues. I got rid of it because at the time, I didn't have the proper tools to expect the front end and I was advised to not go down that rabbit hole. Would it be possible to get access to the maintenance records for that machine? That would be very useful for troubleshooting

author: denimdragon
author_rank: Regular Contributor
timestamp: March 06, 2018, 01:01:08 am
content: Anyone know how to get into the BIOS? I've tried the normal F9, F10, F2, and ESC, but nothing seems to workI'm trying to fix the fan speed as it is running at high all the time. Thanks in advance.

author: texaspyro
author_rank: Super Contributor
timestamp: March 06, 2018, 01:49:52 am
content: A lot of machines from the era used DEL to get into the BIOS.

author: denimdragon
author_rank: Regular Contributor
timestamp: March 06, 2018, 10:23:21 pm
content: Yeap, that's what did it. DEL keyNow to see why I can't get this C2D CPU to boot. I might have to update the BIOS.

author: andy2000
author_rank: Frequent Contributor
timestamp: March 07, 2018, 04:14:13 pm
content: Most early LGA775 boards simply don't support the Core 2 duo. If you can't find a BIOS update, you could look at replacing the board. I don't think there's anything special about the board. The hardest part will be finding one with the same port layout.Having said that, I wasn't able to upgrade my TDS5054 from a PIII because anything newer had ACPI errors when the Tek interface board was plugged into the PCI slot. I guess Tek must have done something non-standard, but they probably fixed that on the B series so they would work with more modern boards.

author: denimdragon
author_rank: Regular Contributor
timestamp: March 09, 2018, 07:30:58 pm
content: Quote from: andy2000 on March 07, 2018, 04:14:13 pmTiN was able to pull it off with the TDS5034Bhttps://xdevs.com/fix/tds5000b/he repaired, so I'm sure I can do it. We have the exact same mini-ATX motherboard. It's just a matter of the BIOS update I believe.

author: denimdragon
author_rank: Regular Contributor
timestamp: March 19, 2018, 10:42:42 am
content: Well, I had everything going great once I put the scope back together with the original hard drive I had, but I decided to clone the drive so I could keep the original disk as back-up. Now the scope won't pass SPCI reset the RTC on the mini-ATX motherboard and now I'm running SPC again and it has been running for at least 15 minutes (It seems like it's hanging). Prior to running SPC I ran the Diagnostic Loop and it passed all 444 with no failuresI'm at a loss here. I hope someone can help with the SPC issue. There has to be a software issue or the like but I'm not sure. Thanks in advance.

author: denimdragon
author_rank: Regular Contributor
timestamp: March 19, 2018, 02:32:06 pm
content: I took the scope apart again and used compressed air to blow it out really good, and checked all my connections twice. That did it! Now it pass SPC consistently again. The connection to PowerPC and the mini-ATX motherboard wasn't seated perfectly so I think this was the issue but I'm not sure. Either way I'm happy. Now to try and finish it todayThanks everybody for the helpP.S. Does anyone know how I can activate the Software Applications (JIT, etc)?