TV Repair Questions? Ask a TV Technician for Answers ASAP
Hi there and welcome to Just Answer, my name is ***** ***** I look forward to helping you.
I’m sorry to hear you're having trouble. I know that can be frustrating. Hopefully, we can get this resolved quickly.
Shut down your Mac.
Find Command (⌘), Option, P, and R on your keyboard.
Turn on your Mac.
Press and hold the Command-Option-P-R keys immediately after you hear the startup sound.
Hold these keys until the computer restarts and you hear the startup sound for a second time.
Release the keys.
Then tell me how the monitor now works please
If you connect the monitor to another device, how does it then work?
Connect the monitor to one of your cable boxes, that connects to your TV
Does it work on this?
What re your TVs connecting to for a signal?
When you say another plug, which plug are you referring to?
As I want to test the LG on a different device, such as the one your Tv connects to for television
This is why I asked.
What are your TVs connecting to for a signal?