Intermittent Black Screens with 27" on Pro
I am experiencing random black screens while I work. I have two cinema displays. Both are 27" thunderbolt. (But this issue happened when I only had one.) They are running on a Mac Pro. And seem to have no discrimination to what program or OS version. While working, they will simply blink to a black screen, then go back (as if they were resetting or turning off/on). They do not do this at the same time, but they both do it—independently of each other. There also seems to be a subtle click noise that occurs. Below are my stats:
Mac Pro (Late 2013)
Processor: 3.5 GHz 6-Core Intel Xeon E5
Memory: 12 GB 1866 MHz DDR3 ECC
Graphics: AMD FirePro D700 6144 MB
Apple Thunderbolt Display (x2)
27-inch (2560 x 1440)
AMD FirePro D700 6144 MB graphics
Any ideas? It is seemingly happening more often recently.
PS. This post should be under "Thunderbolt Display" but it will not allow me to move it.
Thunderbolt Display (27-inch), OS X Yosemite (10.10)