Question about Toshiba 55H70 55" Rear Projection Television

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Temporary loss of picture

There are lines at the bottom of the picture. The picture periodically shrinks to a single line. I hit the top of the tv and it comes back. What is the problem and about how much does it cost to fix?

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temporary loss of picture - 09366fe.jpg-texto

Posted on Mar 14, 2008

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1 Answer

TV Picture shrinks down more and more until it gets to a line.


You may have a cold solder joint around the Vertical circuit. Resolder the pins of the LA7833 IC and the components around the IC.
Check the C308 220uf/35V & C320 100uf/50V.
Nous Sabre.
www.aaatvservice.com

Jan 28, 2012 | Toshiba 32A33 32" TV

1 Answer

Projection lights don't line up


Sounds like your convergence chips have failed. This is a common problem. You can get a repair kit from www.TvRepairKits.com .

Apr 11, 2009 | Philips Magnavox 9P6034C 60" Rear...

2 Answers

Shrinking Picture


problem is bad soldier on the vertical IC , this part needs to be resoldier to solve your problem, its a simple job for any tv repairman.

Jan 10, 2009 | Toshiba 36A40 36" TV

1 Answer

HITACHI 53SBX59B, projection lights don't line up.


It sounds like bad solder connections in the convergence output circuit. It may also be an intermittant convergence output ic which will need to be replaced.

Jan 04, 2009 | Hitachi 53SBX59B 53" Rear Projection...

1 Answer

36 Inch Toshiba - Single Bright Horizontal Line


You're losing your horizontal voltage that drives the fly back transformer. Poking around inside can be hazardous to your health since you have to worry about high voltages present on the picture tube even when the TV is off. You may still be able to get parts for those old TV's but they may hard to find. You can try here, but if you have no background in TV repair, it will be pointless.
TV Parts Universal TV Stands DLP Chips ShopJimmy

Mar 20, 2017 | Toshiba CZ36T31 36" TV

1 Answer

RCA tv model F32649 white horizontal lines


the problem of your tv is in vertical section, to be sure change all the capacitor in vertical section.

Sep 27, 2008 | RCA F32649 32" TV

1 Answer

After a few minutes picture shrinks to single line on screen and then powers off


Since the set works initially, there are likely poor solder connections at the vertical IC. If this is not addressed soon, the IC will fail and need to be replaced. The vertical IC is a small flat IC with about 11 pins or so that may be marked LA7837 or something similar. Try resoldering the pins first. If that fails to resolve the problem, replace teh IC. Feel free to post the marking here so I can verify you have the correct one.

Dan

Jul 30, 2008 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

JVC model AV 278p6 standard television


I'll bet you have vertical output IC with some pins not soldered. This IC ( integrated circuit) is a "chip" that makes the picture fill out from top to bottom. After a period of time heat will cause the pins to crack loose on the circuit board. You need to have a tech check it for you. Stargazer

Aug 16, 2007 | JVC AV-27530 27" TV

1 Answer

Picture Shortens, Converges, eventually the set shuts off - $50 for Correct Solution


Open the TV amd turn it on in a position you can see the picture, possibly through a mirror. Now gently tap all of the metal heat sinks on the circuit board until you find the one that is sensitive it will have a small chip mounted vertically on it, with probably like 7-10 pins. The number on the chip will most likely be an "LA****" number. Now turn the circuit board (UNPLUG FIRST) over and resolder the pins. This is your problem 99% of the time. Be very careful there is High Voltage inside this TV.

Apr 26, 2007 | Zenith IQB36B42W TV

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