LG 32LC2D-UD: Seizure-riffic!

[YamahaFreak]

I have been given an LG 32LC2D-UD flat panel television that has an unusual problem...the set powers on and technically runs okay, but at all times while it is on, the screen rapidly flashes colors in a seizure-inducing manner, along with lines and pixelation/artifacting that changes with the menus and displays onscreen. There is also a high-pitched hissing/whining coming out of the speakers that changes with the volume level, and disappears when the sound is muted or turned all the way down. Any ideas? This is an earlier flat panel from April 2006, and is quite dusty.