Dead PC

[Grzyb]

A friend of mine has given me his girlfiend's PC to have a look....

Basically it's a Gigabyte GA-7VTXE

With an AthlonXP 1800 and 512mb of DDR DRAM PC2100

When I switch it on...There is power to the Hard Disk/Floppy/Writer/DVD-Rom

But the PC Display doesn't fire up...No Beeps...No Bios messages, nothing....

I suspect the MOBO has gone....Could these symptons also come from a dead CPU?? OR duff Memory card....

I have tried a different graphics card and still get the same result...

I could try the memory/cpu in my system but don't want to render my system useless as it's running o.k...

Any feedback greatly appreciated..