Three Nintendo monitors, three Nintendo problems

[More Cowbell]

I have a Popeye that I'm trying to restore and I have three monitors with which to do it.

Monitor 1) Came in the cabinet, dull colors, blotchy. Took it out, adjusted colors and brightness, all of a sudden it looks crisp and beautiful (not necessarily due to my adjustements). I put it back in, dull colors, blotchy. Looks like it needs to be degaussed. Do the degaussers go bad and sometimes correct themselves? Would a cap kit help?

Monitor 2) Nice colors, top 3" smear to the right (horizonatally). Did a cap kit, no change. Any ideas? Any other caps I didn't replace perhaps causing this?

Monitor 3) Beautiful colors, slight burn in from Dr. Mario but looks fine behind smoked plexi and when running game. Top 1/2" smeared (scores). Tried adjustments. Will a cap kit fix this?

[grantspain]

the ptc components can go open circuit thus not operating the degauss coil
as for your others it does sound like caps or adjustments.

[More Cowbell]

Is there a way to fix the degaussing coil?

[grantspain]

you can try replacing the ptc component,may do the trick otherwise buy a degaussing wand as they are always helpful

[ncflagg]

I have spent hours working on a few monitors that ended up being video connector problems. The monitor looked great one minute and then was missing colors/dark/hazy the next time I turned it on. Sometimes the punch-downs to the connector work loose or the pins get pushed back.

[cw]

thats one good reason to reflow the input pins and to double check your harness for damage or corrosion on the pins....

[SavannahLion]

the ptc components can go open circuit thus not operating the degauss coil
as for your others it does sound like caps or adjustments.

PTC?

[Kevin Mullins]

PTC

Generally the round disc looking component you will find near the plug in on the main chassis for the degauss coil. They can also be found contained in a small square box. Without getting technical about this, it acts as a switch based on the current flow and tewmperature change due to that current flow.
It is ON when cold, OFF when hot.