ATI RADEON graphic card problem
my graphic card RADEON 4670 was dead.
I have sold a new graphic card on internet (ref 661 - 5539), the seller said it's compatible with imac late 2009.
i install it inside and my screen stay black. the imac boots but only my external monitor is working (my sreen is working with old graphic card).
can i solve the problem or i must purchase the 661 - 5308 ? (the good part i think).
on information system, il see that number of ROM and EFI are different.
thank you for your help
Is this a good question?