Desktops
Q: 2nd monitor not recognized suddenly after sleep following el capitan update
iMac 27 inch 2014 model with 512 GB SSD; apple cinema display attached as second monitor in use for split screen. Worked great for two years; after El Capitan upgrade also worked until I tried shut down; system hung and when I returned (after I left for a weekend thinking it had shut down) ; it went to sleep mode and now 2nd monitor is not recognized and is black; power is fine and monitor seems to be functioning otherwise. Tried system reboot and unplugging, re-plugging in monitor and did NVRAM/PRAM and SMC resets with no luck. Suggestions?
Posted on Apr 6, 2016 4:34 AM
