I recently took my PC to my parents' place but ended up leaving it in the car for two days without using it. Now that I've returned home, it just won't turn on. I don't believe anything happened during the drive since it was a short trip and the PC was secured well. Additionally, even though it was left in the car, the temperature outside is similar to room temperature, so I don't think it got too cold. I came across a suggestion online about unplugging the power supply from the wall, holding the power button for 30 seconds, and then plugging it back in. However, I'm not sure which cable they were referring to since I'm not very tech-savvy outside of gaming. I've tried unplugging all the cables from the motherboard and plugging them back in, but it hasn't worked. Can anyone offer some advice?
2 Answers
It sounds like the power supply cable might be a concern, but don’t worry, it doesn't typically fail from just sitting. However, your PC might have moved around with bumps in the road, so it could be worth reseating the RAM and GPU. If you're comfortable, unplug the PSU cables from the motherboard and reconnect them—this might help! Just be cautious not to damage any pins while doing it.
I tried the reseating approach, but sadly, it didn’t solve the issue. It’s frustrating!
Have you checked the fuse in the plug? Sometimes that can be an easy fix for power issues. If you're unsure how to check or change it, it might be a good idea to ask a tech-savvy friend to help you out.
I looked into this and it sounds a bit complex for me. If I can't get it working soon, I’ll definitely reach out to a friend who knows computers. Thanks for the suggestion!

I carefully unplugged and reconnected all the cables, but it still didn’t turn on. I might need to ask a friend for help since I may have missed something.