I have a Sony BVM 1311. It produces a sharp, colorfull image from composite and RGBS (from a SyncStrike). The only problem is that the image fluctuates in brightness rapidly, producing a flicker. In addition to this, the 'baseline' brightness level will instantly change at random (but not rapid) intervals. So, I get a flickery image that becomes a brighter flickering image or a darker flickering image at random. This affects all four inputs, and is present on the built in crosshatch pattern.
Sometimes there is a pinkish bar at the top of the screen. This can be chased away by adjusting the Brightness and Contrast knobs, but if I manual adjust those values then the flickering usually gets worse. In the attached picture, the bar was not showing up at the moment under automatic settings, so I had to enable manual B&C control and fiddle with the knobs to make it appear.
The Brightness and Contrast knobs seem to "skip" values. That is to say, if I am turning the Contrast knob slowly up, the image will gradually change, then suddenly, instantly go to max value, before reaching the end of its possible travel.
I do not know where to begin with this. Should I just take it to a TV repairman? Might it be just a simple recapping job that I could have a friend do? Do I just need more BNC terminators?
Somebody please help me. This is a sweet piece of gear, and I would really like to be able to use it as my primary gaming display. I have attached a picture of my input section as currently hooked up.

