I have a JVC Model AV27320. Apparenlty one of my daughters friends messed around with the adjustments and now it is dark screened. I have had to take the brightness and picture to full up and it is still very dark. Everything else is normal. I cannot get it to reset no matter what i do. I have tried the so called hidden code (time set, mute , up/down) and it does not come up. any ideas? thank you jeff

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