Hard Drive Problems
Allow the computer to cool before turning it on
A hot hard drive may prevent the operating system from starting. Try allowing the computer to return to room temperature before turning it on.
Run Check Disk
1.Click Start 
→ Computer.
2.
3.Click Properties→ Tools→ Check Now.
If the User Account Control window appears, click Continue.
4.Follow the instructions on the screen.
Memory
Memory errors detected on start up
•Check memory modules for correct seating and orientation. Reseat the memory modules if applicable (for more information, see “Removing and Replacing Memory Module(s)” on page 39).
•Computers using a
Display
If the display is blank
•The computer maybe in a power saving mode. Press a key on the keyboard or press the power button to resume normal operation.
•Test the electrical outlet. Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
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CHAPTER 6: TROUBLESHOOTING