Hey Folks ! Got a Mac Pro (Late 2013) that has started to act funny video-wise. AMD FirePro D300 2GB graphics. Have a dual display configuration: Apple LED Cinema Display 27-inch and a Viewsonic VX2457 23.5-inch. Lately, both screens do a quick flicker, then go black for a few seconds, then come back on.
Any ideas as to what is happening? Is there a program to check the video circuit? Any help will graciously be appreciated. Thanks!
You can run Apple Diagnostics
Use Apple Diagnostics to test your Mac - Apple Support
However, it does not find all problems, especially intermittent problems.
Have you unplugged and replugged all video cables at both ends if the monitor has a removable cable.
Try connecting to different ports , especially connecting each display to different Thunderbolt bus. Some of possible video connections share the same Thunderbolt bus. See:
You can run Apple Diagnostics
Use Apple Diagnostics to test your Mac - Apple Support
However, it does not find all problems, especially intermittent problems.
Have you unplugged and replugged all video cables at both ends if the monitor has a removable cable.
Try connecting to different ports , especially connecting each display to different Thunderbolt bus. Some of possible video connections share the same Thunderbolt bus. See:
Hello lllaass: thanks for effort and direction. Turned out to be a flaky 27" Apple Display. As we all know they don't last forever, and this puppy has started to break down. Swapped out the 27" Display and no more blackouts. Again Thanks !
Mac Pro Late 2013 Video Problem
