Question about JVC AV-27730 27" TV

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JVC AV-27730: horizontal bright line across screen in the

JVC AV-27730. horizontal bright line across screen in the middle. Initially turning set off and then on restored picture. Problem got worse and now only the horizontal line appears. From other inquiries it appears to be a common problem with this set. Dave K

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If you havent fixed your problem yet, i had the same problem twice. It turned out to be the vertical hold. i have had the tv for a long time and had three problems. like i said twice the vertical hold and now i have no picture with a blinking light. i may give up on it and get rid of it

Posted on Nov 14, 2010

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It could be an electrolytic capacitor or the vertical output I.C. in the vertical circuitry,if you remove the rear cover tap on the board in different places and see if the picture fills out or atleast jitters like it might fill out,then it could be just a cold solder joint,then remove the main board and resolder all joints and this should repair the condition you have

Posted on Nov 19, 2009

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Since Intermitant always inspect the vert ckt for bad solder connections. If not replace the output IC they're cheap and most likely the problem If you still have lines on the top or bottom I would replace all of the electrolytic capacitors in the vert ckt also. Without much test equipment rebuilding the whole little ckt is the best way to go.

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One thing you should not do with electronic devices which have a start up proceedure is to turn the power off, and then on again without a wait of about five minutes. Some equipment manuals warn you about this, and specify a longer period. The start-up has to have time to reset. It will be more likely to reset if you do not leave it on standby, and even unplug it. In your TVs case you need to describe the distorted picture as it may give a clue to a fault, or incorrect start-up. The horizontal line indicates the frame timebase had stopped working. No picture could be a fuse blown inside the set, or a timed cutout which may reset after a time. Try after several hours to see if it comes on. If it is just the frame timebase (vertical) it is worth repairing.

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