Sorry if this is the wrong place to ask, but it seemed the people in this thread would know exactly what I'm asking for, so I hope you'll forgive me
We have an iMac with defective 6970M 1GB MXM; so we ordered a new card from Ali, which usually is without problems, but this time we received a card that doesn't originally belong to an iMac.
We noticed this instantly since the back plate was different from what Apple uses (was glued on and had nuts instead of the usual holes for Tork screws). After changing the backplate, we installed it anyway, but we only get a black screen. The imac seems to boot up fine though, since we can hear normal HDD activity. After a while when it's supposed to boot to desktop, it reboots, and does this over and over again. So:
- After researching the issue, am I correct in presuming the only thing we need to do to get the new card working is replace the rom chip with the one from the old card?
- If not, which other chips need to be replaced? (there is a very similar chip just next to it)
- Am I correct in presuming the ROM chip is the chip with the purple dot (in my case - not really a dot, more like a tiny paint spill)?
- If the part numbers of both cards are exactly the same, should I still check of the RAM chips are of the same brand or does this not matter? The new card is installed in the iMac so would have to remove to check the RAM chips. On the original card the chips are Samsung. Model nr of both cards is exactly the same, but original card has 'BLACKCOMB' printed on it, the new one does not.
- If this route should fail, or otherwise not be possible, is there an alternative way of flashing this card so it would work? Have read some things on here, but nothing concrete as to how to do this, what tools/software to use. Our expertise lies in hardware, so we would much prefer to solve it with replacing the necessary chips.
Many thanks in advance for all info you can give me!