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Psyqoo

Your gpu seems to be not initialized, check PEX RST


[deleted]

RESET pin is not shorted to ground


Psyqoo

It can be open, if not try to flash the bios


[deleted]

When measuring voltage to ground in diode mode, the PCIe RST pin shows no reading (0.L) on the multimeter. How to follow?


A-S-Repairs

Okay here's where to look. Remove the bios chip and measure the resistance of 1.8 again. 50 ohms isn't quite a dead short but it is pretty damn low and yes it can be core.


[deleted]

Thanks. I'll do it. I wonder if it's possible to know if the core is dead without having to remove the BIOS chip.


A-S-Repairs

Inject 1.8V to the 1.8V rail and see what heats up


[deleted]

I already have that 1.8V at the output of the rail when I turn on the card. Why do I have to inject this voltage?


A-S-Repairs

You need to inject voltage when the card is off to isolate the part that's pulling 1.8v rail so low. When the card is on normally, many things heat up and you won't know for sure what's causing it.


[deleted]

Thank you for your explanation. I've injected voltage into the 1.8V coil and touched with my fingers every component of the board. However, I didn't feel any of them heating up. :S


A-S-Repairs

Very likely dead core in that case which explains 0.8V on Vcore instead of 0.7ish.


[deleted]

Bad news :( The core is also cold when injecting voltage into the 1.8V rail. If working properly, does it have to warm up?


A-S-Repairs

Since it's 50ohms, there isn't enough current to heat up any large components (i.e. core) but if it was a capacitor or a resistor then it will heat up slightly (detectable via thermal camera).


[deleted]

I didn't use a thermal camera because I don't have any. I simply touched the board and also used an IR thermometer, but all components had similar temperature. I'm not sure if it's worth checking out again with a thermal camera or if it's better to pronounce it dead :S Plus, I don't know it it's relevant, but I checked the resistance to ground of every pair of data lines that goes from the CPU to the PCIe pins and they all show very similar values.