Vertical hold unstable until warm, then sporatic behavior. picture flickers because of vertical hold problem.
when tv is first turned on, there is horizantal black areas above and below the picture.
i'm thinking a electrolitic capacitor in the vertical section.
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Vertical jumping may have a vertical hold issue, horizontal may have a horizontal hold issue. Most older tv sets will have some knobs or adjustable screws for vertical and horizontal hold. Turn your set on and check for these knobs on the back of your set and adjust until your picture is in as well as you can get it
Make a fist with ur hand and bang on the tv bazel frame.The tv picture flickers back or bounces back to a normal picture.The tv have a vertical or a horizontal hold ics have coldsoldering joints and requiring resoldering.If u bang on the tv bazel frame picture don't flickers back or bounces back to a normal picture.The tv have a vertical or a horizontal hold ics are dead require changes those ics chips.If u don't have all the tools.Can't do a basic soldering work or able to changes those ics chips.Shop around for tv shops for estamate and repairing prices for repairing.
What model and brand is your television?
Is it a CRT type or DLP?
If picture is getting smaller then larger, and its a crt rear projection television sound like you have bad connections around the Flyback transformer and or horizontal circuits. This usually happens when a connection is made on the circuit board and the picture returns to normal especially during a cold start, but as the television warms up the connections on the board start to seperate and the problem starts occuring or it could be in the reverse process. Unstable at first then when tv gets warm it make better connections. All in all have a technician check the HV section of your deflection board.
Here's an oddball, but if you have some thing similar, hopefully helpful. The problem turned out to be the focus anode (coming out of the flyback, going to the focus block) had broken loose enough to start arcing inside the flyback. Gently pulling the wire out of the flyback, clipping, stripping and tinning the end, and gently pushing the tinned lead back in until it locked proved to be the answer.
I have the same TV built in 99. My problem is similar but the vertical hold gives out when the tv warms up about 5 minutes. I will attempt to locate the vertical hold circuit and replace any parts I suspects may be the problem. I suspect a cap is leaking or transitor around IC700 is degrading when warm.
I have seen this many times. There is a 9 volt regulator on the small signal board that causes this. The regulator goes bad and the 9 volts starts dropping, especially at start-up when the regulator is cold. If the voltage is below 8 volts then the picture gets dark and the vertical becomes unstable, with the picture squeezing down and/or rolling. As the regulator warms up the voltage starts rising back towards 9 volts and the symptoms start clearing up. There are 3 regulators in a row on the board and the regulator in the middle is always the bad one. Replacing that regulator should cure your problems but it should be replaced by someone experienced in servicing Mitsubishi projection TV's because pulling the chassis out is quite tricky.