I recently tried to upgrade my cooler and had to take out the motherboard for a new backplate. After reassembling everything, my PC will only power on for about three seconds before shutting off again. The power button isn't responsive either. I did manage to get it to boot once, during which I played some games and ran benchmarks, but the same issue returned afterward. I've gone through all the troubleshooting steps I could think of, like rebuilding it, removing the motherboard battery, and changing the CPU thermal paste. For reference, my setup is a Lenovo Ideacenter T540-15AMA G Desktop.
3 Answers
Did you install the new cooler properly? It’s crucial to remove any protective film and ensure everything is seated right. Sometimes, benchmarks can mask overheating issues if something isn’t right with the cooler setup.
You might want to test your power supply first. I've had a situation where my PC wouldn’t turn on, and it ended up being a dead power supply that I didn’t even suspect. Just a coincidence that happened when I was working on something else. Better to rule it out!
Thanks for the tip! How do I go about testing the power supply?
Actually, if it’s consistently booting for a few seconds and then shutting down, it could be short-circuiting instead of just being the power supply. Make sure that the backplate isn’t making contact with any components it shouldn’t. That’s a common cause for this kind of issue.
That makes sense! I haven’t faced this problem myself, but it definitely sounds like something to check.
I checked everything, and the temperatures were normal. No issues while gaming either!