I just got back from vacation, and my PC was powered off completely while I was away. After turning it back on, it booted up fine but started lagging significantly within a few minutes. It took ages to open the task manager, and eventually, the computer just shut itself off completely. Now, it either shuts off shortly after booting, gives a boot error, or turns on and then shuts down again after a few minutes. I've already dusted off the inside and replaced the thermal paste, plus tried a new power cord, but nothing has worked. The area behind my CPU on the motherboard feels pretty hot, but I'm unsure if it's too hot. I've had this PC for over two years without any issues and suspect it might be a hardware problem, but I really don't know what to do next.
3 Answers
It sounds like overheating is likely causing your shutdowns. Make sure all your fans are working properly, especially the CPU cooler. If the fans are running, that doesn’t always mean the cooler is functioning well, so check that too.
Here are a few things to check: 1. Did you remove the sticker from the CPU cooler's cold plate? 2. Is the pump connected to the correct fan header, and does it have the right settings? 3. Ensure the mounting pressure is sufficient—there could be a misplaced washer or an incorrect backing plate. It really sounds like overheating, so take care!
Definitely check for any signs of coolant leaks from your CPU cooler. Even if the fans are spinning, a leak can prevent it from cooling effectively.
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