Thomson 4460D EGA computer monitor missing color red

[Jan3Sobieski]

The monitor is missing the red color. I tried hitting it, tapping, didn't work. The monitor has a switch that goes from multicolor/green only/red only/blue only.

- Multicolor option shows all colors but red
- Green only shows green
- Blue only shows blue
- Red only shows green

Color white is displayed correctly. Just red/light red/brown/light brown are not shown correctly

I took it apart to look for bad solder joints but couldn't find any. I don't see any bulging capacitors.

There are three boards inside the monitor. One that lays flat on the bottom (looks like power related) one on the side where the signal cable goes to and a third board that's hooked up to the back of the "bulb"

EDIT: Please see photos here http://imgur.com/a/B2ihV

On the first photo, there are three knobs on top. Left one controls brightness, middle one controls intensity and the right one switches from the various modes i mentioned earlier.

[Jan3Sobieski]

no one can help?