Help! Anyone know what would cause this sort of flash you'll see it around the 1 min mark and 1 min 13 second mark. It happens a few times one startup, but will randomly happen anytime the screen is one regardless of whether it's being used or not. I've reset the Pram and did a diagnostic and nothing showed. https://youtu.be/81YlxfDj5fc
iMac 21.5″, macOS 10.12
I watched your video and see the issue. Since this happens randomly, this is most likely a hardware issue. I would use this link, Mac Repair - Official Apple Support, and setup an appointment at an Apple Store or AASP to get your Mac checked out.
Backup all data before sending it into repair.
Cheers,
Jack
I watched your video and see the issue. Since this happens randomly, this is most likely a hardware issue. I would use this link, Mac Repair - Official Apple Support, and setup an appointment at an Apple Store or AASP to get your Mac checked out.
Backup all data before sending it into repair.
Cheers,
Jack
IMAC weird Screen Flash
