I have a ~2012 27" Apple Cinema Display that will only display for the first few minutes after sitting unused for a while. All the other components like speakers and camera continue to work, and the Mac continues to see it. I've tried with 3 different Macs. I've tried wiggling the cable at both ends to no avail. Seems like once it builds up a little bit of heat it stops displaying. Has anyone dealt with this issue and resolved it? What piece of hardware could be at fault? I took it to Apple and they want 800$ to fix it, citing a panel being at fault. Seems odd that it would work sometimes and not other if failed. Any advice is appreciated!!!