we have several games in our arcade with D9200s. well, 3 actually. 2 of them had various issues with primary colors taking a shit. one of them we actually sent away to PNL, this was back when I was first breaking into repairing video games, so I didn't know about a simple transistor replacement yet. the screen was completely blue. there was another that had no red. the one that was sent away to PNL worked fine for awhile, and then the blue went out on it. I wound up fixing both monitors myself at that point.
what's interesting is the 3rd monitor never exhibited any of these problems. I haven't had to do anything with it.
the PNL monitor though, is a unique bird. after all the work I've done on it, periodically the color biases will change on its own, or the service menu will randomly pop up on its own, and mysteriously the degauss doesn't work on it anymore either. it also has a fucked up flyback too, when I tried adjusting the focus it made some hisses and even shut down at one point, but I set it back and it's still working fine. I know that sounds horrible, but it is what it is I guess lol.
the color bias issue though is a common one, apparently there's a chip on the chassis that can get corrupted or something. it's encouraged that you do the factory restore first. the GOOD monitor and the PNL monitor for whatever reason have slightly different menus, but I think the restores work the same way in that you select the restore, and you have to hold the button down for a certain period of time to confirm that you want to do it.
from there, you can tinker with the bias settings. if they're way off at all though, like you got a double digit for one color and triples for another, I think that might mean something else entirely. you could try reflowing the solder on the transistors, cause I had one that still had color but it was extremely faint. turned out to be a cold solder thing. it should also be noted that the bias settings in the regular menu and the factory menu are independent of one another. make them even in the regular menu first, then do the factory one. I think there's drives and then biases too, there's like 3 adjustments in the factory menu.
don't drive any of them too high. I think that's what makes the transistors go pop. the ones that I serviced myself, I bought all new resistors (replacement
here)for in addition to changing the transistors (replacement
here). it's encouraged by Chad at arcadecup that you leave the biases turned down a little bit to extend the transistor life.
they're a pain in the dick, but all in all, they look very nice when they do work.
if you have any other questions let me know.