Need help for fixing a XFX Radeon 5600 XT

[Battledoge21]

I'm posting this here since its' not necessarily a Linux-related issue.

I recently bought a broken XFX Radeon 5600 XT (THICC II) for dirt cheap, however it had some issues. The description read:

"GPU does not display an image or otherwise appear to function, and the GPU device is not present in device manager. The fans on the card do not spin, and there is no display from any ports. It is not known what is causing the issue. Seller makes no warranty as to the repairability of this unit, and it is not known whether or not the factory warranty is valid."

Upon testing it in my PC, this in fact is the case. So I did a full teardown of the card, repasted the chip, cleaned off all of the usual trouble spots with Isopropyl Alchohol. A full and thorough visual inspection was conducted, but there was no visual damage whatsoever. Even after reassembly, the card did not function and still presented the sane symptoms. I have tried:
lspci
sudo ./amdvbflash -i
sudo ./amdvbflash -f -p 0 56XT6150.W8
sudo ./amdvbflash -f -pa 56XT6150.W8
sudo ./amdvbflash -fp -p 0 56XT6150.W8
None of which yield any results. In addition, I switched the dual bios switch and tried all of the commands and looking in the computers' UEFI (none of those showed any signs of detecting the GPU). I also tried the same commands with vBIOS chip shorted out, and still nothing.

So, does anyone have any idea how to fix this thing? I'm thinking that it's and issue with the GPU chip itself, a bad connection or something. I'll likely end up baking the GPU to try and fix it, but before I do, does anyone have any idea how I might fix this thing?

Thanks, in advance!

 

[Brickwizard]

If it is advertised as broken, then Free is too much to pay,

what would I do, check it has not been cannibalised, and still has the correct GPU in it, then i would get out my high magnification glass and very carefully inspect for signs of overheating, and dud joints,
if there are sings of overheating, open window and hurl it as far as you can,
if you find any bad joints if you have the right kit [very fine point low heat soldering iron and soft solder, you could try and repair them, personally unless electronics are a hobby I would not bother with it

 

[Battledoge21]

If it is advertised as broken, then Free is too much to pay,

what would I do, check it has not been cannibalised, and still has the correct GPU in it, then i would get out my high magnification glass and very carefully inspect for signs of overheating, and dud joints,
if there are sings of overheating, open window and hurl it as far as you can,
if you find any bad joints if you have the right kit [very fine point low heat soldering iron and soft solder, you could try and repair them, personally unless electronics are a hobby I would not bother with it

Thats the thing- there is absolutely no physical damage which leads me to believe a bad solder joint on the GPU chip, or a vBIOS issue. Thanks for the advice though

 

[Brickwizard]

Thats the thing- there is absolutely no physical damage

If you cant see any heat damage to the board or smaller components , Have a good look at the connector tabs, if any are damaged/missing or broken through miss handling by the previous incumbent then it will not make a proper connection, no point in trying to use a multimeter to find the problem as you are unlikely to find the schematics and parts spec on line to test against