Hi guys, I've been troubleshooting a k4900 monitor from a pacman machine I bought a couple weeks back. The chassis has just been re-capped, and the game worked great for a day or so.
After a while, the top of the screen became brighter than the rest, along with some degradation of the picture (see pic). Later, the picture dsappeared completely, leaving only a white band at the top of the screen (see earlier post at:
http://forum.arcadecontrols.com/index.php/topic,38787.msg348832.html#msg348832)
I've pulled the chassis a couple of times, replaced one cap that was missed when the cap kit was initially done, and re-soldered some joints that looked bad, but no luck. All I get now is the white band at the top of the screen.
The troubleshooting flowchart mentions cap 702 as a possible cause of the initial bright screen problem I was having. I havent yet re-done the cap kit, but may try that next. It seems strange that a cap would go bad so quick though.
If anyone has seen this type of problem, I'd appreciate any advice as to whether I'm on the right (or wrong) track.
Thanks