Tv has lost two outer sides of vision despite changing picture mode
Was watching tv as normal - all had been ok when screen suddenly went fat and then shrunk into the centre of the screen so we can just see 1/3rd of the screen with the picture squashed into it... the outer edges are black. it has a slight curving to the edges too. Have tried to change the picture mode but it doesn't make any difference. It is on all channels and on all the AV channels.
Any ideas please from anyone.
Re: Tv has lost two outer sides of vision despite...
That's either a high voltage problem, or a deflection problem.
WARNING, CRT Based Televisions have potently life threatening voltages inside them, and should be serviced by trained personnel only.
With that out of the way.
According to http://www.repairhelper.com
It's a capacitor failure
Fault - Width and E/W correction fault
Remedy - Replace R626 and C630
I don't have a manual so I can't tell you for sure what the resistor and capacitor do, or where they are located.
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get the on screen menu on the screen
scroll around till you see aspect ratio and click on that use the buttons to change ( you will see the changes on the screen)
click ok and exit when satisfied
Fir aspect ration to change there can be a few reasons
some tv stations produce movies in the wrong ratio and it shows up for the movie as black edges or tall figures or fat figures ( change channel to verify)
or there can be a fault occurring in the board of the set that will not hold preset aspect ratios
CHANGING THE SCREEN ASPECT RATIO: ( From Manual )
The TV can display images in four different modes: Wide, Zoom, Panoramic, and Normal. Each mode displays the picture differently. To change the screen aspect ratio:
1. Press the MENU button on the remote.
2. Use the Arrow buttons to highlight the Wide icon. Press OK.
3. Use the Arrow buttons to highlight your desired screen mode and press OK:
• Normal preserves the content's original aspect ratio. Since the 4:3 aspect ratio is not large enough to fill the TV's screen, black bars are added to the left and right of the display image.
• Wide stretches a 4:3 aspect ratio picture to the edges of the screen. Since the picture is being stretched, the display image may appear distorted. If the program is already formatted for widescreen viewing (1.85:1 or 2.35:1), then black bars will appear on the top and bottom of the display image.
• Zoom expands images with black bars to fit the screen.
• Panoramic expands the display image to fill the screen.
images may appear wider than intended.
If you are watching widescreen (1.85:1 or 2.35:1) content, black bars will still appear on the top and bottom of the display image. This option is only available when the TV is displaying a 480i/480p source.
Watch some HD or other 16:9 programming. If you have pillarboxes on the sides it is likely that you are watching a 4:3 program that doesn't fit your TV's screen. When people upgrade from a "regular" TV to a "widescreen" model they changed the shape of the TV but didn't change the shape of 60+ years of TV programming, the only ways to force the "square peg" to fit the "rectangular hole" is to either chop off the top and bottom of the image or to stretch it. I highly recommend against either of these as "Stretch-O-Vision" is just wrong because it makes people look fat and turns car tires and other circles into short fat ovals.
The words "Digital Noise Filter Off" and "digital Noise Filter On" appear on the top left and right and side of the screen and the words " Auto Visulisation" appear on the bottom of the screen all the time when watching normal T.V.(series 5 lcd) and if we make changes regarding in setting in picture option in mode.then after 20-30 min againg it displays same message
That probably happened because something hit the TV and broke the line for pictures to get through, or because a wire in you TV is bad and doesn't wanna work. This happened to my TV every few days. What I did is give it a few whacks every now and then on top of it and the vision came back, but don't try that if you think your TV is fragile. Yes I know its sounds stereotypical but it actually sometimes works.
Sounds like a failed vertical amplifier circuit. This is normally primarily contained in an integrated circuit mounted on a heatsink.
There are other possibilities along the line but the one above is the most likely.
Now all you need is a TV repair shop that is still in buisness.
My LG tv has suddenly got a problem with the picture. Whilst watching the tv with no problems at all,
the picture was suddenly reduced to a thin vertical line down the centre of the screen
and an awful smell seemed to come from the tv
There is a short ckt in your tv in horl. section.
1 isolate power from horizontal section.
2 check for normal output from power supply.
3 check parts in horl output section
a hor.output transistor
b diode & cap in h/output trnsformerckt.
c check for print.
d if all are ok check for eht transformer.
e if every thing becomes then reconnect hor output section supply.
f put on the set.