TFT LCD Monitor: signal but no image

Thread Starter


Joined Jan 25, 2019
If I switch my monitor on, a red light on the monitor appears and after some (very short) time it turns to green and it switches to HDMI input and I have picture. After a few sec - minutes the picture disappears but the input is still chosen and green light stays on. When I connect the HDMI line to different monitor I get image.
So, there is signal, but assume the switch to VGA/HDMI has issue. May be not enough voltage?
I could not identify a part which gets extraordinary hot. May be too low voltage?
Any help appreciated.