iMac display colors messed up following hard drive upgrade to SSD
A friend gave me his old iMac (mid 2007), which I love working with except for the terribly slow speed. I bought a new SSD, cloned the original hard drive, followed the tutorials on how to open the machine and replace the drive, but when I turned it back on the screen colors were all messed up in a rainbowy kind of way (otherwise, the SSD seems to function well and fast!). See picture below
I did a PRAM reset - didn’t work. Thought perhaps I had done something wrong and ruined the display , so I disconnected the SSD and put back the old hard drive - the colors were still bad, but after resetting the PRAM - all was good and back to normal. I was relieved, but the speed...
Next, I tried connecting the SSD externally through one of the USB ports (using a proper adapter, which I use to connect another startup SSD to my Macbook pro and it works just fine). After booting from the original drive, the iMac recognizes the SSD, but when I restart and click the Option key to select a different drive to boot from, the SSD is not recognized. Booting with the old drive and then selecting the SSD as the startup disc from System Preferences doesn’t work either.
I thought, maybe I should remove the old drive and leave only the SSD connected externally - the iMac won’t boot.
Bottom line: I know that the display is not damaged, and that the cloned SSD seems to work just fine, except that it messes up the display parameters. I assume this is not a hardware issue with the SSD (otherwise, why would it be working just fine in all other respects??)
Thank you in advance for making the effort to help.
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