Only see a slice of picture + bright horizontal band
I get a bright horizontal band plus what looks like a more-or-less properly proportioned, 2" high section of the picture directly below the band. It looks like I'm seeing a narrow window of the entire picture. Color and sound are fine as is the small section of the picture that is visable. The window I see is a tad short in width, but otherwise OK.
I have already replaced the vertical IC (Sanyo LA78041) and the 2SD2499 transistor on the same heat sink, which had no effect on the problem.
My next step is to check all the related vertical caps around the circuit.
Any other suggestions?
Usually the 47 to a 100 mfd electrolytic capacitor although rarely the 1000 mfd 50 volt generally in and around the vertical output chip also just checking these capacitors may not reveal the defect so many times they may test good when they are bad the best way use substitution with jumper leads connect test shut off set go to next suspect turn set on .continue this you may find culpert.
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Its not problem with any setting. Its an internal fault. Vertical scanning output stage has failed in your tv. You have to check the soldering of the vrtical output ic if there is any dry soldering this can happen. try to resoder all the points in the vrtical output stage. IF doesn't help then you have to change the vertical output ic. Have added the picture of the dry soldering point how it looks like. If you need further assistance feel free to contact throug FixYa.
Depending on the monitor, you can try looking for an "Auto-Adjust" button. Pressing that should automatically realign the screen to it's proper proportions. If not, the monitor should have a menu where you can locate options to adjust the horizontal and vertical zoom, as well as position.
Press the RATIO button repeatedly to select the desired picture format. You can also adjust Aspect Ratio in the OPTION menu.
Set By Program. Selects the proper picture proportion to match the source’s image. (4:3 → 4:3, 16:9 → 16:9)
4:3. Choose 4:3 when you want to view a picture with an original 4:3 aspect ratio, with gray bars appearing at both the left and right sides.
16:9. Choose 16:9 when you want to adjust the picture horizontally, in a linear proportion to fill the entire screen.
Horizon. Choose Horizon when you want to adjust the picture in a non-linear proportion, that is, more enlarged at both sides, to create a panorama view.
Zoom 1. Choose Zoom 1 when you want to view the picture without any alteration. However, the top and bottom portions of the picture will be cropped.
Zoom 2. Choose Zoom 2 when you want the picture to be altered, both horizontally extended and vertically cropped. The picture taking a halfway trade off between alteration and screen coverage.
Cinema Zoom. Choose Cinema Zoom when you want to enlarge the picture in correct proportion. Note: When enlarging or reducing the picture, the image may become distorted. You can adjust the enlarge proportion of Cinema Zoom using D / E button. The adjustment range is 1~16.
Vertical defection failure. Common failure. Pretty easy to
repair ($50-75?). However, my general rule of thumb is not to
waste any more money on TVs over 10 years old. Too much other
stuff in there ready to fail as well.
Thjeres a problem with the screen voltage driver voltage capacitor or the crt is going bad. have the shop test the b+ on the crt board first off . then remove the crt board and see if the voltage comes up. If it does the capaicitor is bad as it can take the load. But remeber theres extremly hi Voltage inside these sets so its never a good idea to try to do this your self unless you have the training to deal with HI Voltage and the proper saftey and test equipment. Good Luck