Please Help.

My Toshiba display is normal for the top 10 percent. Then there is a distinct line below which materialize vertical multi colored lines that go all the way to the bottom of the screen. These fade in and out. When they are fully there the most wont work it is frozen. When connected to a external display the lines dont exist.

It is a problem that is sorta intermittant but even when it works well enough to use the resolution below that line isnt quite as good. And the system looks like it tries to correct itself.

I had opened the system up to repair the ac connector. There was a loose screw that got into inside.

Torqueing the screen makes no difference, going to battery power doesnt either. The problem remains no matter.