Control board say not availible when any button is pressed, only shows av1 picture and picture is scrambled, toshiba 42h83 modle rear projection tv

of course check different inputs etc to make sure something did not get disconnected.

This rear projection set uses 3 picture tubes and the set will protect them if there is a problem in the vertical or horizontal sweep circuits that might burn the screens or the damage the tubes.

No simple answer as a lot of different parts are possible for this problem.

Download manual from internet and see (can't remember your PIN code)

Most likely the Hyper board is causing the scrambled picture. Very common problem but the boards are no longer available you may try ebay or something for a used one.

ok, you are talking about lines in the picture, it started where it would clear up after a few minutes but now it will slowly take longer?

I know what is wrong.


SD TECH

ENTERING TO SERVICE MODE
1) Press MUTE button twice
on Remote Control.
2) Press MUTE button
again to keep pressing.
3) While pressing the MUTE button,
press MENU button on TV set.

If you have a normal picture with lines through it, or if the picture jumps, tears or rolls, you have a Hyper Board that is failing. The last I checked, the Hyper Board is not available from Toshiba and has not been available for a number of years.
I hope this helps,
Skyassoc

Check all wires cables go to the tv,shakes,jiggles might,see the prob.than change the wires cables.Not wires cables,than ur main video board is the prob.must change.

try plugging it in.

Bad hyper board == No longer available
Bad electrolytic capacitors on board need changing-
Let me know if you need more info......T.

Probable PIP sister board.Moderate skill & some tools needed.Advise==get a senior tech near you.