System fails to start due to excessive heat.
System fails to start due to excessive heat.
I was using Roblox when my PC overheated and stopped working, with the screen freezing. After a hard restart and turning it back on, it would freeze at the loading bar. Once that happened, it stopped displaying reliably. In the UEFI, the CPU temperature was much higher than the motherboard—95°C versus about 75°C with the fan running fast. I left it off for a few minutes to cool, but it still didn’t load Windows. Later checks showed the CPU stayed hot (around 70°C) while the motherboard was near 50°C. I reworked the CPU for the first time and waited 30 minutes, but it kept getting hotter to 95°C. The specs are: Windows 10 22H2, AMD Ryzen 5 3400G, ASRock DeskMini X300, various SSDs and a HDD. No overclocking was used. This PC has always throttled during intense tasks like gaming or encoding. What might be wrong? Besides reworking the CPU, could other components be faulty? Any advice would be appreciated. I’ve attached a screenshot of the temperatures in UEFI.
95° at idle isn't typical. A few related images would have been helpful (paste patterns after disassembly). I question if the cooler maintains good contact with the CPU or if the fan spins properly. Is the heatsink dust-covered? Edited March 16, 2025 by leclod
I don't have a prior and subsequent image of the thermal paste. It was somewhat dry before. I applied the "X" pattern during application if needed. I verified the fan was spinning at least. Even after reattaching the heat sink, the CPU reached 95°C eventually. I used compressed air to blow out the heat sink during disassembly. It wasn't very dusty before, I think. Edited March 16, 2025 by testnow720 Answered "Cooler not making good contact with CPU"