Dell Precision M6500 bricked vBIOS - Page 1
Forum section: electronics / repair

author: User32
author_rank: Contributor
timestamp: August 17, 2020, 02:51:29 pm
content: I managed to brick yet another FirePro M7820 because of the dogshit software that is called ATIWinflash, tried flashing a 1.25V BIOS to my GPU and my flasher crashed halfway.Is there a way I can fix this? I have a Revelprog-IS on order, a working M7820 in another M6500, and I have a CH341A but no wires for the clip.

author: PKTKS
author_rank: Super Contributor
timestamp: August 17, 2020, 04:20:22 pm
content: Remove the BIOS chip and re-flash from scratchby using an external programmer.Last hope in case you can manage this still cheapPaul

author: User32
author_rank: Contributor
timestamp: August 17, 2020, 04:25:06 pm
content: Quote from: PKTKS on August 17, 2020, 04:20:22 pmProblem with that is: I can't solder.EDIT: Programmer has been sent and I also ordered a preprogrammed BIOS chip in case I can't do ICP.

author: User32
author_rank: Contributor
timestamp: August 18, 2020, 07:44:56 pm
content: Went to someone with a programmer and clip and it seems it's impossible to in-circuit program. Looks like I have to wait until the chip comes in the mail or find soemone to remove the chip and program it myself.

author: aqibi2000
author_rank: Regular Contributor
timestamp: August 20, 2020, 10:07:03 pm
content: The programmer doesn’t have the output impedance to drive the I/O when in circuit.Quite likely the issue

author: User32
author_rank: Contributor
timestamp: August 23, 2020, 06:25:58 pm
content: Had the chip pulled, double checked both vBIOS'es I have (1.15v and 1.25v) with Radeon BIOS Editor, flashed the 1.25V vBIOS with the (excellent btw) Revelprog-IS programmer and gave it back to the guy for soldering. Wish me luck, I better hit 1 GHz core clock on that fucking M7820 after so much trouble!Really pissed the brick happened though, with stock/1.05V I hit 850/1200 clocks which is unheard of with a M7820.

author: wraper
author_rank: Unknown
timestamp: August 23, 2020, 07:00:31 pm
content: Should be able to unbrick without desoldering anything.https://www.reddit.com/r/Amd/comments/3nxhju/my_semidetailed_guide_to_unbricking_an_amd_gpu/As you most likely have no video on the laptop, you can create a bat file for it to run automatically on startup. Or simply type blindly.

author: aqibi2000
author_rank: Regular Contributor
timestamp: August 23, 2020, 07:14:58 pm
content: Ch341a is a 5/3.3v programmer

author: User32
author_rank: Contributor
timestamp: August 23, 2020, 08:06:52 pm
content: Quote from: wraper on August 23, 2020, 07:00:31 pmQuote from: aqibi2000 on August 23, 2020, 07:14:58 pmI already own a CH341a but I don't have a Pomona 5250 clip, I ordered one from the USA. Oh, and blind flashing is not an option, the M6500 does not boot with a bricked vBIOS.

author: User32
author_rank: Contributor
timestamp: August 29, 2020, 02:49:49 pm
content: W00t, received my Pomona Clip. Now how the hell do I connect it? I have leads for the Revelprog but the pinout is incomprehensible to me.

author: aqibi2000
author_rank: Regular Contributor
timestamp: August 30, 2020, 06:28:44 pm
content: You’re confused how the SOIC 8 adapter pin out will match you numbered 1-8 pins on your programmer?Just use some DuPont wires

author: aqibi2000
author_rank: Regular Contributor
timestamp: August 30, 2020, 06:35:58 pm
content: Pin out is just the usual 24/25xx series flash 8 pinYou have the header on the side of the programmer and also can lock DuPont pins into the ZIF locking socket too. Just improvise it’ll take only a few minutes.

author: User32
author_rank: Contributor
timestamp: April 29, 2021, 03:18:55 pm
content: So, final report: card is dead. I had the vBIOS chip replaced again with another, known good one and yet the card stayed dead.