its sounding like power supply or motherboard is dead,same thing just happend to my mates and it turned out to be power supply,my mate has all the gear to diagnose hardware problems including a power supply tester and whats called a probe that plugs into a pci slot and it tells you what the problems are,i have software that runs lots tests to diagnose faults but as your pc wont post thats no good to you,if you could get the pc to me i can borrow the tools to sort it,if you lucky its just your power supply,you can get a cheap 600w to 700w psu on ebay for around £35 with bags of room for any upgrades you might want to do in the future,if its the motherboard then your looking around £70 for a new one,here is an ok board for £61
http://cgi.ebay.co.uk/ASUS-SKT-AM2-M4A7 ... 19badb3715 and some here for under £50
http://www.overclockers.co.uk/productli ... 483&mfrid=if you do have to replace the motherboard then chances are you will also have to rienstall windows.if there is stuff you need backing up from the hard drive then that wont be a problem
