1. Test your monitor. Before you begin more complicated and time consuming troubleshooting with the rest of your computer, make sure your monitor is working properly.
It's very possible that your computer is working fine and your monitor is your only problem.
2. Verify that your PC has fully power cycled. In other words, make sure your computer has completely reset - make sure that it's coming on from a completely powered-off state.
Often times a computer will appear to "not be on" when actually it's just having problems resuming from either the Standby/Sleep or Hibernate power saving mode in Windows.
3. Troubleshoot the cause of the beep code if you're lucky enough to get one. A beep code will give you a very good idea of exactly where to look for the cause of your computer turning off.
If you don't resolve the problem by troubleshooting to the specific beep code, you can always return here and continue with the steps below.
4. Clear the CMOS. Clearing the BIOS memory on your motherboard will return the BIOS settings to their factory default levels. A BIOS misconfiguration could be why your PC won't startup all the way.
5. erify that the power supply voltage switch is set correctly. If the input voltage for the power supply is not correct (based on your country) then your computer may not turn on completely.
6. eseat everything possible inside your PC. Reseating will reestablish the various connections inside your computer and is very often a "magic" fix to problems like this one.
7. Reseat the CPU only if you suspect that it might have come loose or might not have been installed properly.
8. Check for causes of electrical shorts inside your computer. This is often the cause of the problem when the computer powers off by itself but certain shorts can also prevent your computer from booting fully or showing anything on the monitor.
9. Test your power supply. Just because your computer's fans and lights are working does not mean that the power supply is functioning properly.
10. Start your computer with essential hardware only. The purpose here is to remove as much hardware as possible while still maintaining your PC's ability to power on.
Is your computer still not showing anything on the monitor? Get More Help for information at 1-800-986-4764