Toshiba Rear Projection HDTV Queston

[MikeFu84 18]

Not sure if this is the place to ask but I am having troubles finding an answer on Google.

My parents Toshiba Rear Projection HDTV is having some problems when it's first turned on. The screen is completely unviewable, has wavy lines going right to left. After about 15 minutes the screen is crystal clear. It's just getting really annoying everytime the TV is turned on that you have to wait 15 minutes before you can see clearly what's on the screen. Anyone know what would cause this?

[spikey_richie 220]

Does it do it regardless of the input source?

[MikeFu84 18]

Does it do it regardless of the input source?

That's something I haven't tried. I will try switching the input source next time I am over. Is there anything else you can think of that I can check?