When you say "it appears knackered", what exactly do you mean? Does it no longer work or does it malfunction?
Did you upgrade your power supply when you fitted that card? It's a fairly power hungry card and the standard Gateway power supply is only just powerful enough to power the machine without any upgrades.
Rik from RCE
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Sounds like it has had it from that description. What make and wattage is the replacement power supply?
Try resetting the cmos by removing the CR2032 battery for a few minutes with the power unplugged. You will have to re-set the clock and the boot order but it should get the built-in graphics working.
Rik from RCE
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