IMac Peculiar Display fault


Joined
May 11, 2022
Messages
1
Reaction score
0
iMac 16,1
21.5in, late 2015
Core i5
OS X El Capitan 10.11.16
(I am an Apple novice)
Boots up OK, then after about five minutes the display jerks left and right a couple of times. This increases gradually until it goes crazy for about 20 secs when the computer shuts down and reboots. If left to itself it will repeat this performance ad infinitum.
By chance, on one occasion before the screen started acting up, I initiated a McAfee full scan. The display fault did not occur, and as the scan takes hours, I was able to use the computer as normal. This has been tested multiple times, and as long as a scan is in progress there is no display problem. Any ideas ?
Zen.
Three pics attached.
 

Attachments

  • PIC1.JPG
    PIC1.JPG
    422.6 KB · Views: 2
  • PIC2.JPG
    PIC2.JPG
    440.3 KB · Views: 3
  • PIC3.JPG
    PIC3.JPG
    438.3 KB · Views: 2
Ad

Advertisements

Joined
Mar 22, 2022
Messages
59
Reaction score
5
the Video Ram is failing... had the same thing on a old iMac.. and a week later the main mother board went. sorry. Regards, Sandy
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top