How To Guides - http://www.softwaretipsandtricks.com/guides
The computer powers on, beeps and stops. No Power On Self Test (POST) messages.
http://www.softwaretipsandtricks.com/guides/articles/123/1/The-computer-powers-on-beeps-and-stops-No-Power-On-Self-Test-POST-messages/Page1.html
By Super Admin
Published on 06/21/2011
 
The computer powers on, beeps and stops. No Power On Self Test (POST) messages.

The computer powers on, beeps and stops. No Power On Self Test (POST) messages.
This may be a motherboard problem and not related to the PSU. Check the motherboard section of this guide.