One morning i turned on the tv to find that there was blue screen with a pink coloured paddle lock in the upper left corner no matter what i do nothing seems to work ' the remote will not respond excet the on/off button none of the buttons on the face of the tv including the on/off button
We have a vcr/cd player plugged into the tv that had been use when wathcing the tv the last time before the locked sreen appeared.
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It sounds that there is some magnet near by TV that is affecting picture tube. Please remove any extra speaker or any thing that has strong magnet inside, unplug TV for 20-30 minutes, replug back in, turn it ON, hope that will solve your TV problem. Thanks.
Inside your TV there is like a loop of insulated wirings the loop around the screen. This is to demagnetized the tube. There is a varistor which looks like a thick coin with two leads on it, or sometimes it looks like a flat ceramic capacitor that control this loop of wire. When you first turn on your TV current goes through the loop of wires to demagnetize the TV then the varistor shuts off. Sometimes this varistor fails, causing smeard colors. You can also demagnetize the screen without opening the TV. Using a hand held demagnetizer. It can be purchased at some electronic parts store.
Somehow in handling the remote control I pushed a button or combination of buttons and now have a blue screen with a lock symbol in red in the top left hand corner. I've tried turning the tv off, and unplugging it, as well as a combination of buttons on the remote, but it still is there. What do I need to do to remove the lock?
Yes it is A degause fault caused by either something magnetic being close to tv screen EG hifi speakers.
Or faulty degause thermistor, Or degause thermistor is not making good contact with pcb & only requires resoldering to pcb.
Allso try turning tv completely off at the mains switch leave a few hours then switch back on.
If you decide to take to A repair shop this repair is not expensive.
as you are seeing blue colour along with lines called retrace lines.
1 check supply to blue video circuit.& transistor.
2 check crt base for loose
3 check components in blue video circuit.
4 check for loose contact in connector.
5 check for signal processor called chroma ic.