computer won't start

imedia x2415 will come on for about 3 secs then switches itself off,start button goes red instead of blue,and goes straight out.nothing on the screen

maybe a failed power supply
probably a blown motherboard

thanks for the reply,how will i know which it is? can i test them in any way? regards

same as we do when repairing machines
Trial and error
Unseat / reseat everything, then fit a new PSU, if that doesn't work fit a new motherboard

Probably a good idea to get someone to do it for you as the motherboard is a socket 775 model - of which few are in production now, and those that are, mainly use DDR3 memory (yours is DDR2) and so would also need replacement. Being an Acer-built machine it may also have non-standard mounting blocks for the front panel connectors - which either require jumper leads or a a fine hand with a scalpel to cut the blocks up. Also you'll run into both driver and windows activation problems when you change the board and boot the machine up

Raise a job request at http://www.pciq.com
That way, while you'll have to pay labour costs, you wont have to buy unrequired replacement stuff just to check things out

thanks again for the reply, you've been very helpful, much appreciated, regards Julie