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Hi my name is*****'m a 30 year audio/video engineer. I think I can help.
Have you tried a full reset?
I'll send you the excerpt from the service manual.
Press “TEST “ and “RESET “ key in sequence when the set is ON . The LAMP,TIMER and POWER LED light and the picture is muted. After about 5 seconds the LAMP and TIMER LED go off, and the color of POWER LED changes from amber to green. After another 10 seconds the reset is completed and the initial set-up display appears.
On the remote
Here is an alternate reset procedure.
Turn on the TV. While holding down the V button on the remote control, press the POWER button on the TV. Release the POWER button then release the V button. The TV will turn itself off, then back on again with Initial Setup. WARNING: This operation will clear all of your customized settings including Parental Lock setting
If this doesn't work, try using the "up" arrow on the remote instead of the V button
John, I hope this takes care of your problem. If not, I'm still here to help even after my rating. Please rate my service and if you need me, I'll be here. ~Wayde~