UPDATE:
I ordered a programmed IC103 from ArcadeCup. Went in easily and with the writing facing the same way. Monitor started up and started buzzing loudly. The buzz seems to be coming from the far right area of the board (if you are behind the monitor. The flyback isn't loud at least.
I have no red color. Blue and Green are able to be adjusted. I am sending a signal of 640x480 to the monitor. I tried VGA and CGA connections on the input board, swapping the cord/plug in the confirmed correct slot each time. same results.
When I remove the signal and startup, I see nothing. No OSD menu. I plugged in the VGA cable but without anything at the "sending" end, and the screen flashed the "No Signal" in green and then promptly disappeared.
I'd like to fix this myself, as maybe it's something simple. I don't see me shipping the board off to ArcadeCup for $175 plus shipping costs to Chad.
ANY THOUGHTS?!
The Ic is notched and lines up with the notch on the pcb.
don't go by the writing on the ic, as a rule.
Anyway you have a few problems with this chassis
Need to confirm the Q415 and Q416 are working correctly
they can fail and cause audible sound at different frequencys
that the monitor can cover. And will test shorted too.
the yoke can be an issue on these model.
As I mention in my notes if Q415 and 416 are real hot after a few minutes then they are
not right. Again anytime they are replace the drive transistor needs to be replace at
same time. So the chassis can switch correctly between signal
and not get resistance. from two or more frequency switched on.
you need to see the internal test message showing over and over, not stop!
You need to see red in the OSD to tell if the last stage on red is working.
The Video processor do fail on the neck board.
Again the guns do arc within and can damage the IC.
and can fightback after clean and balance or rejuv, They can open at any time.
the shorting of the cathode will let you know if you still have red gun working
or check again with tester.
When the red is not working the collector voltage will be high
compared to the others on a test pattern.
Chad does have the neck board but I see any NB as repairable
Got any photos of the picture during these test?
But you need the signal hooked up to get OSD feature to work.