Robert M Estall Posted March 12, 2020 Share Posted March 12, 2020 (edited) The black screen is not necessarily a hard drive giving up. The Graphics card is just as likely to be the culprit. But replacements are not always available. Our clever flat designs make replacing components far more difficult than old fashioned towers. My 2011 iMac was coming and going with black screens. The culprit was traced to the Graphics card. A replacement was not available and my consultant advised me to stay well clear of e-bay offers. Suck or blow the dust out by all means, you might get lucky. There is a technique called re-flow but it's likely to be short term. These big iMacs are more like jumped up laptops and getting at the insides was not really intended. If you have the earlier slightly fatter iMac with CD/DVD slot on the side, you have the option of lifting off the screen (take great care!) replacing the main drive with a SSD (1 TB have come way down in price) chucking out the DVD drive and replacing with a small hard drive (say a 2 TB 2.5 inch). But if your Graphics card is on the way out, none of those are viable. If you have the later thin-edged model, the screen is harder to get off and back on and you have only the one space for a drive. Edited March 12, 2020 by Robert M Estall Link to comment Share on other sites More sharing options...
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