How to Diagnose PC Hardware Problems


Use the general diagnosis table below as a guide to finding the problem component. We have separate diagnostic pages for each component of the PC.

Symptom
Check
Click on underlined items for further information
When I turn it on...
It makes no sound and there are no lights
When I turn it on...
It just beeps
When I turn it on...
It sounds normal but the screen is blank
When I turn it on...
It starts up but never loads the operating system
When I turn it on...
It freezes BEFORE the operating system starts loading
When I turn it on...
It freezes WHILE the operating system is loading
This is probably a software problem not covered in this hardware guide. If you are using Windows, try booting into safe mode by holding down the "F8" key or in some cases the "CONTROL" key.
While it is on...
It makes a screeching or other loud noise
While it is on...
It shuts itself off
  • Check the power features in the BIOS
  • Check the power features in the Windows Control Panel
  • Check the Power Supply
  • Check that all fans are working
  • Check for the accumulation of dust
If the problem occurs in association with a specific hardware component, visit the diagnostic page for that particular part.
Software Issues are not covered in this hardware guide.