my pc switches off after using it for long time

Super User Asked by Aarav Prasad on July 26, 2020

My pc is pretty old, i never had a problem with it but few months ago my used to switch off for no reason within 1-2 hours of work and it wont start before leaving it for 6-7 hours, i figured out that my CMOS battery was dead but after changing it my pc worked just fine for few hours and again the same problem, but now my pc wont switch off so frequently but it still have that problem, i checked everything including temperature cleaning the motherboard and keeping pc in cooler place, what should i do now? i cant figure out the problem

4 Answers

This is most probably due to overheating.

Install an app to check the temperatures (coretemp, speccy, speedfan, etc) and monitor them until the pc shuts down.

As someone else said, it is most probably the CPU (nowadays the RAM is pretty much never to blame for anything).

Quickly check if the CPU fan is actually working, if it is then monitor the temperatures.

Answered by CrazyEyesDave on July 26, 2020

Start with the simple possibilities first.

Probably the CPU overheating. The thermal paste between the CPU and Heatsink will degrade over time. A simpler answer is that your CPU fan and heatsink are covered in dust, which acts as an insulator. Perhaps your entire PC is covered in dust. One might assume that you clean the inside of your computer every so often, but you didn't mention it, so I won't assume it.

You may also have the bios set to shut the PC down once it reaches a certain temperature. This combined with a dusty system could be the culprit. Check your BIOS under Hardware Monitoring and see if this is the case.

Can't be more certain without additional information.

Answered by Josh Campbell on July 26, 2020

First check that your RAM strips are clean or not, and they are properly seated in their slots. Moreover, disable the "Fast Boot" option in your BIOS. It also may be due to overheating. I have also heard this as a symptom of overheating. Run speed fan test, and see if the Temperature go up and the computers shut down or touch the heat sink and check if it is too hot to touch

Answered by Naheed Mir on July 26, 2020

This same thing used to happen with my 7-year-old HP laptop. Try reseating RAM in a different slot(if you have more than one available) after cleaning its pins with an eraser. Otherwise, consider changing RAM, it will most probably solve your problem.

Answered by Dhruv garg on July 26, 2020

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