Actually, Bobg1, I have seen these exact same symptoms on a laptop LCD, and it was in fact a "loose cable". Upon opening the case I discovered that the ribbon cable to the LCD screen was not seated firmly into the connector on the mobo. The screen in question was not showing red hues, but instead, a washed out yellow.
dash111 - a disclaimer to my above post, it is extremely easy to damage a laptop by trying to fix it if you are not experienced. Trust me.
Matthew Janes
Everything in its right place...