If my experience is anything to go by, the card is probably just playing dead. I belive the vga silencer is what is killing the cards due to the grounding plate (which pretty much makes the core part of the grounding).
Ive had to recover my 9800 twice now. (I have removed the vga silencer for now, and using stock heatsink). Both occassions it took a few days of messing about. Once I found a computer that posted with the card in and a pci card, I let windows boot and display on the pci card and just left it a few hours (with stock cooler) and let the card heat up as normal.
after a few hours i reset and the radeon bios flash program would see the card. i took this opportunity to flash and all is well since.
Untested, but leaving the card on for a few hours with no display or post may have the same effect, with the card springing to life a few hours later. my boards that posted are an early nForce2 Epox board and with a cleared bios, my abit kt133 board would boot also. and allow me to use a floppy to flash the card(after hours and hours of trying as the flash program just says card not found untill I left card to heat up for an hour or so). Incidently, my abit NF7 wouldnt post with radeon in , nor did my old ecs kt133 mobo, and nor my Asrock kt600 mobo. the epox had no trouble posting, and its the board i fixed card in after many hours trying .
I flashed the original bios for the card i backed up when I baught card. Hope some of this information helps. after bringing my card back from the dead twice (second time took a week of messing about) I really do belive your card is just playing dead. If you continue with vga silencer id remov the grounding plate. Both occssions my card died was when the tv out was hooked up(but not in use), and the grounding current from tv/vcr is enough to make ya fingeres tingle so with this going direct to the core prolly didnt do it much good.
-> bron :
http://forums.pcper.com/showthread.php?t=366259
(iemand met identiek hetzelfde probleem van mij opende daar een threat)
eerst proberen dus
