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Our mitsibishi rear projection tv gets a red tint to it and when you bang on the cabinet it goes away, sometimes the picture goes black and won't come back on for a while
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TV has 3 CRTs, red, blue, green. Its possible that you have a bad blue or green crt. If that were the case the red would be prevalent and the pic would be reddish. The tv has a picture "level" adjustment that if done correctly could get it looking correct. Its probably best to have a tech. do it since you can make it worse if you do not know what you are doing, also there are high voltages present. Good luck
For a rear-projection Sony about 10 years old, just open it up (after its been off for awhile and unplugged..of course) and look for a pair of black plastic parts about 1 1/2 inches by 2 1/2 inches with lots of metal leads going into the circuit board, mounted vertically on pieces of aluminum with fins for cooling. They should be marked STK392-120 or STK392-150 or some other STK number. These need the pins to be resoldered underneath on the circuit board (if you are inclined and know how to solder). If resoldering doesn't fix it. They need to be replaced. They can be ordered from:
www.ued.net or any other online parts distributors...just Google the STK number on the parts in your set. They typically cost about $11.00 - $17.00 each
Try resetting the TV by unplugging from wall outlet for 3 to5 minutes then plug back in. If no fixya take front grill off and panel and adjust the screen controls, turn color off adjust for Black & White Picture. Good Luck, big IRISH.
Most likely cause would be a loose solder connection that expands as the set warms up until it no longer makes a connection. You may get the blue to come and go by hitting the side of the cabinet after the set is warmed up awhile. (don't hurt your hand doing this, and don't keep doing it to "fix" the set. The connection will have to be located and repaired). Otherwise, there could be a component going bad, including the blue picture tube.
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