Possible causes in vertical lines of LCD
A few days ago I tried to increase the memory of two iMac's, from 8GB to 16GB, using memory with factory specifications.
In the first everything turned out as expected, however, in the second, after making the change, the LCD screen showed two vertical lines since the system started. I replaced the original memories and the problem persists, have I damaged any components?
Which component could have been damaged? Thank you very much for your comments and suggestions.
This is how look
Is this a good question?