Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Why does my IMAC screen go blank for a fraction of a second repeatedly

Why does my IMAC screen go blank for a fraction of a second repeatedly

iMac, iOS 8.1

Posted on Oct 30, 2014 2:51 PM

Reply

3 replies

Level 10

684,039 points

Oct 31, 2014 8:28 AM in response to Blackadder186

Apple Hardware Test doesn't catch everything, so even if it doesn't find a problem, you could have one.

Apple Hardware Test

Apple Hardware Test – Invoke and Interpret

Apple Hardware test – How to run and interpret (2)

Apple Hardware Test - Using

Apple Diagnostics – Computers introduced after June 2013

Reply

Level 6

13,220 points

Oct 31, 2014 5:50 PM in response to Blackadder186

Could be backlight or inverter on the way out. Apple or an AASP can check better than the hardware test using their Apple Service Diagnostic. How old is this Mac?

Reply

Nov 1, 2014 3:19 AM in response to WZZZ

Two years.

Reply

Why does my IMAC screen go blank for a fraction of a second repeatedly

Welcome to Apple Support Community

A forum where Apple customers help each other with their products. Get started with your Apple ID.

Learn more Sign up