Question about Toshiba 28N33 28" TV

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Problem with tv

Watching tv and picture went to a line across the middle of the screen, sound ok does this mean a new tv or can it be repaired

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Re: Problem with tv

Hi. No this is a run of the mill fault not that complicated. Repair shop should be able to repair with out any problems.

Posted on Sep 04, 2007

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This is not a user repairable issue and would require a TV repair shop. You may want to consider a new flat screen TV before spending the money on repairs.

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Tv screen is black except for 1 horizontal line of color

The line is there because the vertical deflection unit - the one that spreads that line across the entire screen to form the image - has failed. Replacing it is a job for a professional, or at least an experienced amateur, and the parts will be quite difficult to find for such an old tv . 

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Did you mean the picture is collapsed only in the middle horizontally(white line appears on the middle part of the screen)?
If that is the case, maybe vertical IC failed or loose connection.

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The problem is sometimes caused by the vertical output integrated circuit (IC) failing, but usually it's bad solder connections. If you or someone you know is comfortable with electronic soldering, a few minutes spent resoldering the IC pins to the circuit board will often solve the problem. Failure of these connections is common because the IC gets quite hot (and it's mounted on a metal heat sink). The heating and cooling cycles cause the solder joints on the circuit board to crack. You can usually see the trouble with light and a magnifying glass; gray grainy joints instead of shiny connections, and often visible ring cracks around the pins.

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1 Answer

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This is what is known as frame collapse - which means there is no vertical deflection applied to the tube.

Please do not continue to watch the set in this condition as it may burn a horizontal line in the middle of the screen.

The most likely cause is either bad solder connections to or failure of the frame vertical output IC.

Please rate the assistance I have given - I hope it is useful. If you call a serviceman and tell him its frame collapse as this type of repair is not for amateurs - voltages in television receivers can kill.

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1 Answer

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Could be a horizontal output fault, faulty power supply, a simple dry solder joint or HVT. If you can hear arcing or smell an ozone odour, it will be the HVT which may cost a bit.

Without knowing the actual cause, it's impossible to say how much it would cost to fix it.... could be anywhere from $50 to $250 etc

Best to have it checked by a technician and get a quote to repair... then decide if you think it's worth it.

Toshiba is generally a reliable brand, so if you were happy with the picture quality before the fault occurred, it's probably worth repairing.


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1 Answer

Problem with tv

Its known as 'screen collapse' and yes it can be fixed but it may not be economical you should get some quotes from your local tv repairers.

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Pls more info; what do you mean tv on, picture froze? you are watching on tv chanel, do you use cable? I can help you but need more details.

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