Boot failure my computer is not booting..... and i m alo not able to hear the beep whenever my comp boots motherboard :asus P5GZ-MX processer :intel p4 ht graphic c : asus en7900 /16x 512mb

Samuel,
if you don't here ok beep or any error beep:

1. First check out speaker is connected properly to motherboard.
2. Remove all component from motherboard like HDD,FDD, RAM etc..
3. Just put only processor to your board and power-up
4. There must be a long beep for missing RAM, if not means you have problem in Motherboard or CPU. Try out another board and another CPU to find out which one is faulty.
5. If you got missing RAM beep, then power-off and add RAM. Then power-up there must be ok beep (only one beep) or missing RAM beep. If missing RAM beep, then your RAM might be faulty try to clean the connection point with pencil earaser and try out again. If no success then try with another RAM.

Check and be sure the power supply is set at the correct voltage. Ours was set for 230V and as soon as we set it for 110V it worked perfectly.