I recently replaced my PC case and fans, and now it shuts off about 20-30 seconds after I power it on. When I turn it on, the GPU and AIO lights up along with the fans, except for the two bottom fans. The monitor temporarily shows a signal but then loses it. I've checked all the cables to ensure they are securely connected. There's a red and yellow light near the DRAM and CPU during boot that disappear once it's fully powered up—I'm not sure if that's typical. Any assistance would be greatly appreciated!
2 Answers
I had a similar issue once, and I ended up discovering it was the thermal paste on my CPU. I replaced it, and everything started working perfectly again! You might want to check that if you haven't already.
Are you using an AM5 motherboard? If so, try looking for the Memory Context Restore option in your BIOS settings and enable it. Might help if you can get into BIOS, but I understand if your PC isn't booting far enough.

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