Not booting up

[Guest]

Yesterday ! I was trying to boot up my system it gives single long beep and didn't boot up at all.what could be the problem.

 

[shortstuff_mt]

What does your motherboard owners manual say about a long beep? Is this a new system or an old system? Have you recently made any changes to the system? What are the complete system specs?

Here's a checklist that was created just to assist in troubleshooting no-boot problems:

http://www.tomshardware.com/forum/261145-31-read-posting-boot-video-problems#t2091479