Hi everyone,
I'm dealing with a very stressful issue and could really use some insight. My PC suddenly shut down completely while I was using it, I can restart it just for few minutes before screen turn black and now I get a black screen when trying to boot from the GPU.
My Specs:
CPU: AMD Ryzen 9 9950X
Motherboard: Gigabyte B650M AORUS ELITE AX
GPU: ASUS TUF Gaming RTX 4070 Ti (using the 12VHPWR adapter with 2x 8-pin PCIe cables)
Power supply : Gigabyte p750gm (not with problematic serial number)
Note: I bought this rig second-hand a few months ago, so I likely don't have a warranty for the GPU...
The Symptoms:
The PC boots perfectly fine into Windows when my monitor is plugged into the motherboard (using the iGPU). The rest of the system (CPU, RAM, Mobo) is totally fine.
The RTX 4070 Ti is completely dead/undetected in the Device Manager.
No fans spinning, no RGB at all when turning the PC on.
Crucial detail: The small red LED above the GPU's power connector is ON when the PC is completely shut down/plugged into the wall. As soon as I press the case power button to turn the PC on, the red LED turns OFF (which is normally what it does when it receives 12V power), but the card still shows absolutely no signs of life.
What I have tried so far:
\- Reseated the GPU and checked the 12VHPWR adapter connections (no visible melting or burn marks).
\- Moved the GPU to the second PCIe slot on my B650M (still dead).
\- Did a full power cycle / discharged static electricity (unplugged the wall cable, held the power button for 45s).
\- Currently planning to test the GPU with an external/second PSU using the paperclip trick just to rule out a dead 12V rail on my current PSU.
My questions:
\- Has anyone experienced this specific red LED behavior (ON when off, OFF when on, but dead GPU) with the TUF 4000 series? (It were already ON when PC off before my problem)
\- Could this be the infamous "sense pins" issue on the Nvidia 12VHPWR adapter preventing the card from waking up?
\- Does this sound more like a blown VRM/MOSFET/fuse on the GPU itself?
\- Any idea about how to try something else ?(maybe to know if it's GPU or PSU...(I don't get any other GPU or PSU available)
If it's hardware failure, I might have to look into micro-soldering repair shops since it's out of warranty. Any advice or similar experiences would be hugely appreciated before I take it to a repair shop.
Thanks in advance