Redleader!, get a bottle of isopropal alcohol and a 1mm (insulin) syringe. Spray the alcohol over and under the chip as well as doing the whole board, ram traces, BIOS traces the lot!...
I've had two leadtech cards die (Gf2pro and Ti500) and be reserected by 'spirit' cleaning them. I'd be genuinly surprised if that Gf4 is DEAD dead, I bet it's sleeping

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I've had one boot as a quadro for a week until I cleaned the BIOS chip

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I've had one spout pink 'expanding wall foam' like stuff from one of the Surface Mount capacitors and die, and an then work after being cleaned with WD40!!!...
I've had one sprout 'dots' all over the screen until I cleaned the RAM with spirits/alcohol, it was dust though not AS/silicon that time...
Basicly I think there IS a short that needs cleaning off. just give it a go or post it to me

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