computer turns on for 5 seconds the off?

I switched my computer on this morning and to my horror it switched back off after about 3-5 seconds, I have tried another power pack and the same thing is happening.

Any ideas whats wrong
 
Check to make sure the processor fan is running and its not clogged with dirt or dust bunnies. if it is then get a can of compressed air and blow it out.
 
thanks, i've tried all that before hand - the fans are all running fine and are clean, tried different ram, lift the hard drive and move it about and its power up as you can feel it, any other ideas?
 
Back
Top