Kind of a vague dumb question, but I'm hoping for something obvious that I missed. I recently worked on some machines for a guy. His Mario Bros monitor was squished up top.
First thing I figured was check B+ on the monitor. B+ would not adjust over 90v. So I figured lets give a cap kit. While doing the deluxe cap kit, I also replaced the b+ adjustment pot (5k, from Bob Roberts)
After doing the cap kit, I brought it to check it out on some one elses Donkey Kong because I don't have a 100 volt power source. I didn't hook up the video and all that (Though I should have) But I plugged it in and metered the b+. It was at around 107. I went to give it a small tweak to 108 but it just kept slowly rising to 122v or so and would not adjust down. I really wanted to get this setup before going back to the owners house because its a good length drive. I know I should have plugged it all into the donkey kong for check out, I don't know why I didn't.
Any ideas would be very helpful. I suppose it could be the power filter cap, it just seems weird that it wasn't high before th cap kit.