LED Cinema Display USB Ports Broken - How to Change Brightness?
Hi! I just bought this display on eBay, and unfortunately, I found that its USB ports do not work. And as such, I can’t change the brightness (which sucks, because the person who last used it turned the brightness way down). I’ve plugged in the USB cable with the display, but again, I don’t believe it works.
I’ve attempted to reset my iMac’s PRAM, restart it, switch USB ports, change computers, different keyboards, unplug the display and wait, et cetera, but no dice.
I also have a 24” LED Cinema display, and that one works perfectly fine. An odd behavior of the ports is that as soon as I put my iMac to sleep, the ports start “working” - they don’t transmit data (or at least, I don’t think so), but they do charge my iPhone, so they are capable of power transmission. But as soon as I wake the iMac up, poof! It stops charging. The USB cable does look slightly beat up, but I don’t think that’s the problem, and would like to try every other available option before needing to replace that, as even though it’s doable, it’s a serious PITA!
So, is there any way to change the brightness, without using the built in USB cable? Or, is there any way to reset the display to its original factory settings (as I have a feeling the factory brightness is somewhat better than what I have now. I don’t care about changing it at all once it’s brighter - I just need it to not be this dim!).
Unfortunately, I don’t think installing any apps will work for my case, as they don’t permanently change the brightness (at least, I would assume), and my end goal is to use this display with my PC (which works just fine, but again, the brightness…). Thanks for the help!