No video on Thunderbolt Display, but audio works. Bad power cable?
My 27” Thunderbolt Display is having an issue where it will not display video at all upon being plugged in, or will work correctly but then go stop showing video suddenly after two or three hours of use.
Strangely, even though when the video is not working, my MacBook still recognizes it (in the sense that I can select screen arrangement settings in System Preferences and also move my mouse onto the other screen). Furthermore, the speakers and camera still work when the screen is black.
I have tried resetting PRAM/SMC and tested multiple laptops and the problem persists. I have also tried using an external thunderbolt cable. Finally, I have shined a light on the display when it is dark and I can’t see any faint images.
Two things that sometimes work to “revive” the display are plugging the AC power cable into another outlet or unplugging the AC power cord where it connects to the back of the display and then plugging it back in. I have also noticed that if I accidentally bump the AC cable where it plugs into the back of the display, this can cause the screen to go black.
What is the likely culprit here? I suspect the AC power cable, but perhaps it is a logic board issue? Additionally, if the AC power cable is at fault, where can I find the right model? I don’t want to buy the wrong one by accident and I also want to make sure I buy from a reputable seller.
Это хороший вопрос?