Cold solder joints. Open it up and touch up all solder joints that appear loose. I did this in a 1980s ghetto blaster boombox because it would cut out like it's not getting enough power and after I did that it's worked fine ever since.
bad solder joints, especially on transistors that are heat sinked. removal of the board is required, also be super careful CRTs store up to 30 kilovolts of energy like a capacitor, discharging the CRT via the anode is needed after the tv is unplugged to repair.
Those Panasonic black and white monitors were GREAT security monitors!!!! They were crisp and clear! We had about 10 of them in the security room where I used to work. That was 20 years ago! LOL
It doesn't look like a tube problem to me. Since it's only affecting one color, I would start at the CRT neck board. There may be potentiometers there for the blue level and/or blue bias. Mark the positions before you try to turn them. They may just need to be cleaned with contact cleaner. If that's not it, try poking around with a toothpick while it's on to see if the blue normalizes. If it does, you probably have a bad solder joint or broken/dirty connector. I've seen bad solder joints develop over time with heat on the neck board and cause problems like this, and typically they just need to be cleaned up and reflowed. But if there is no result from poking, you could also have a bad transistor on that board. BTW, it's normal for the whole image to flicker on a Trinitron tube when you smack the cabinet. Trinis are very sensitive to vibration.
I'm not sure about the older PVM's like this, but a couple of mine have a "Blue Only" mode. Check the service menu and see if there's a blue only mode on yours.
Lack of green, might have cold solder joints. The streaks can either be the brightness/contrast cranked up too high, bad cable sheilding, or bad capacitors in the power supply area.
Cold solder joints. Open it up and touch up all solder joints that appear loose. I did this in a 1980s ghetto blaster boombox because it would cut out like it's not getting enough power and after I did that it's worked fine ever since.
Green seems to be missing, with out it plants will not show up well 🌱🌱 I bet there is a dry solder joint inside the poor thing.
bad solder joints, especially on transistors that are heat sinked. removal of the board is required, also be super careful CRTs store up to 30 kilovolts of energy like a capacitor, discharging the CRT via the anode is needed after the tv is unplugged to repair.
Those Panasonic black and white monitors were GREAT security monitors!!!! They were crisp and clear! We had about 10 of them in the security room where I used to work. That was 20 years ago! LOL
Free pro (or security) monitor wow!
Maybe it's a bad solder joint or dirty inside.
It doesn't look like a tube problem to me. Since it's only affecting one color, I would start at the CRT neck board. There may be potentiometers there for the blue level and/or blue bias. Mark the positions before you try to turn them. They may just need to be cleaned with contact cleaner. If that's not it, try poking around with a toothpick while it's on to see if the blue normalizes. If it does, you probably have a bad solder joint or broken/dirty connector. I've seen bad solder joints develop over time with heat on the neck board and cause problems like this, and typically they just need to be cleaned up and reflowed. But if there is no result from poking, you could also have a bad transistor on that board. BTW, it's normal for the whole image to flicker on a Trinitron tube when you smack the cabinet. Trinis are very sensitive to vibration.
thanks! smack!
I'm not sure about the older PVM's like this, but a couple of mine have a "Blue Only" mode. Check the service menu and see if there's a blue only mode on yours.
cool poster with Terminator :)
Lack of green, might have cold solder joints. The streaks can either be the brightness/contrast cranked up too high, bad cable sheilding, or bad capacitors in the power supply area.
definitely
reflowing solder joints and replacing capacitors seems like it could help
I don't believe it is the rube. It looks like an echo. I would not be surprised if it was one or more bad capacitors.
You got bad solder connections.
Does a image reset or factory settings do anything? I am also wondering if the screen is failing due to those lines might be a sign it's failing.
have you tried degaussing it?
possible bad capacitors