Externally and internally they look great clean and in excellent condition but they are faulty.
Have experience fixing monitors and tv's have all the necessary tools but never seen issues like this maybe someone can point me
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Monitor number 1 turns on fine they are several problems:
The screen is full of retrace lines.
On the sides of the screen you can see the screen is bending like this -> )( and there's some ghosting in the image also they are a couple of like big dark smushes in the picture.
But there's no OSD and the brightness and contrast controls don't seem to do anything.
What works is:
All the buttons work, pressing the wide screen will flatten the image the input, etc will get the correct thing to happen, the inputs work because you can hear the audio input from them and the small led inside the buttons work.
The "blue only key" will make the screen red and flickering the PSU will make clicking noises during this until the button is pressed again and "blue only" is disabled.
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Monitor number 2 turns one you can hear the high voltage kick in and there's some little glow from the screen but none of the buttons work, the small LEDs in them don't light there's no audio and inputs don't switch contrast and brightness do nothing. There's no OSD or anything else.
So disassembled them and tested the basics, the PSUs are on a separate module from the boards so was easy to check the voltages and they seem to be OK in both units.
Tried swapping the PSUs between the monitor but there are no effect same issues in both.
On unit number 2 thought may the main IC NECD78014 could be bad if socketed so swapped it between units but this don't change anything both sets continue showing the same issues.
Also, check for the presence of VDD 5v on the CPU and is present.
Any ideas where to check first?
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This is from set 1:
Set number 2 there's not much to show.
here is the service manual:
https://mega.nz/file/Exl3ARhI#1XjYEdYo3 ... onfosvqgmY
