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Re: "VIDEO 3" ON SCREEN
It is normal for VIDEO 3 to be displayed in the upper left of the picture if there is no signal present at the INPUT 3 jacks. This is to let you know that although the picture is black and there is no sound, the TV is still on. If you have a good signal at INPUT 3 and the VIDEO 3 stays on the screen, take the Sony remote, point it at the TV and press the DISPLAY button until you see "DISPLAY OFF" on the screen. About 3 seconds later, the words should vanish.
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blue screen indicares that there is a problem in blue cathode circuit.
1 blue video output supply.
2 blue video ckt defective
3 signal from chroma ic to blue cathode missing.
4 loose connector
5 crt base loose.
6 chroma ic defective.
I think sound will be ok .
My dad and I fixed the TV/Video problem over the weekend using one of the solutions suggested. Make sure you stay away from the red wire running from the back of the tube to the circuit board.
1. Take the cover off the back of the TV. 2. On the bottom of the TV is a circuit board that is mounted on top of a plastic tray. Remove the cables running from the speakers by squeezing the tab on the white plug and pulling them up and off the board. 3. Looking at the back of the TV, pull the board+tray out (barely secured in there) and flip it 180 degrees so you're looking at the front of the board. 4. Desolder and remove the TV/Video push button. It's labeled on the PCB, and should be the second button in from the left. 5. Place the tray back in the TV and make sure the other buttons still remaining on the baord are aligned with the buttons on the front of the TV. 6. Put the cover back and you're done.
TV works as good as new again. Of course I can't use the TV/Video button on the TV itself, but the remote handles that fine. 20 minutes max, and no repairman needed.
On a Panasonic to do a factory reset while the set is on press in on the power and action buttons on the front of the TV at the same time. In a few seconds the screen shouls go blank and come up with a screen that says "CHK" in the upper left hand corner. Once it does that press the action button again to clear the screen. You have now reset the TV to factory settings and will have to re-program the channel memory once again. Hope that works...
It sounds as you desribe, the vertical output IC and or the b+ feed capacitor off the Hi voltage transformer feeding the vert. IC its required voltage. Not a really hard job to replace, but not for a handi person to do. This should be left to the professional, as there are no user serviceable parts inside this set and with the HI voltage and the safety issues its best to call somesone to assist you with this repair. Good Luck