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NVFlash can't see GPU after flash

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I tried to modify vbios for NV quadro fx 770m with hex-editor, but something went wrong. After flashing with nvflash (in DOS mode) and restart there was black screen but windows loaded ok because i heard the logging sound.

Then I tried to do "blind flash" but an error occured: ERROR: No NVIDIA display adapters found - I could read this in log file which I made blind.


I tried every possibility with nvflash: nvflash -4 -5 -6 - j -i=1 -n bios.rom  and every time the same error....


Is this card dead or maybe there is a way to replace/fix this damaged vbios?


Thanks for any help:-)

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