Computer not powering on

[The_Logical_Man]

Hi guys, im having a major problem with my computer, just wondering if you guys can help? Since friday my computer has been failing to start up. When i press the power button, everything starts up for about 3 seconds, and then everything shuts down. The fans come on but nothing comes on screen. I have tried a different PSU and the problem persists. i have had the computer for around 18 months with no problems. Not too sure where to go from here, and ideas?

My computer spec,

Motherboard - A7N8X Deluxe with an athlon XP 2600

TLM

 

[RealBlackStuff]

Welcome to Techspot

First thing that comes to mind, is to check that the cooler is properly seated on the CPU. If the cooler would be loose, the CPU overheats in seconds, and some mobos switch everything off automatically, to prevent a burnout.

Also, the CPU could have overheated already and may be dead. Check it in another PC if you can.