Question about Toshiba CF32H40 32" TV

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Horizontal line May 03, 2007 Toshiba manufacturer; Good day, my problem is a black screen with one horizontal line at the center of the screen. the power supply is good and the horizontal ic is also good sincerely yours; olao My Toshiba CF32H40 was working perfectly fine this morning, but having just turned it on (from stand-by) I now get a black screen with an extremely bright horizontal line in the center of the TV. My TV is 12 years old.

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6 Suggested Answers

techman
  • 3130 Answers

SOURCE: No picture...Sound is fine.

There are no tubes, except the picture tube, to replace.. itys a solid state set. your problem is most likly thefiliment circuiut on the crt board, or maybe a verticle problem. I would say with A set of this ventage, will most likly cost to repair more then the sets worth.

Posted on Aug 28, 2006

  • 81 Answers

SOURCE: black screen in middle of picture

go tothe menu, caption, take it off the text mode. this should solve your problem

Posted on Apr 07, 2007

premtech
  • 934 Answers

SOURCE: a bright line on the screen

A line running across the screen like that and then returning to a picture I would guess is the vertical IC has some poor solder joints. The vertical IC in that unit IC401 is an LA78041 a seven pin IC that is mounted to a metal heat sink. On the foil or under side of the board take a careful look at the pins of that IC and any that look suspicious carefully re-flow some solder over.. Careful not to keep your iron on the pin too long.. And if have to re-solder several take some time between them to allow the IC to cool so you don't damage it.. Good Luck Bill

Posted on Jun 10, 2007

  • 2 Answers

SOURCE: Toshiba 27D46 Black Screen - White Horizontal Line

I fixed the problem by taking it to a repair shop

Posted on Apr 26, 2008

  • 4234 Answers

SOURCE: Toshiba CE35f15 TV

This is a vertical circuit problem that is either bad connections on the vertical IC or a defective IC. If you can solder, you can fix this yourself. Look for a small flat IC attached to a heatsink with about 9-11 pins. It may be marked LA7837 or something similar. Try resoldering the pins first. If that fails to resolve the problem, replace the IC. There may be defective caps in the circuit as well, but those don't usually cause complete vertical failure. If the picture does not return fully, update this and we'll continue on to the next step.

Dan

Posted on Sep 30, 2008

CAYPIANAN
  • 227 Answers

SOURCE: no picture only sound, Toshiba 36A 36" TV tube type

my friend if you open the tv carefully look to see if the tube itself has light, or if you have high voltage i coulbe many different things.wish luck!!



caypianan@yahoo.com

Posted on Sep 30, 2008

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Your vertical IC may need resolder. You may have a bad capacitor or two that created an extra warm IC and create bad grounds. So resolder and check those caps near and around your vertical IC. If you continue to see this horizontal line you may have to replace the vertical IC. And you may as well check all grounds as well. Good Luck and be careful!

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Hiii fairley,

You aren't specsificly dercribe yor tv set.
For common TV horizontal problem ;i.e : White line accross the horizontal screen, horizontal band,etc..it's can solved by replacing the IC Vertical/Transistor, and olso to replace the cap nearest the IC.

For common TV Vertical Problem :i.e : White line at the center of the screen (top to bottom),Vertical band,etc...It's can cure by Replacing the Horizontal IC/Transistor,and offcurse the cap's.

Tha's what all I know....

Hope can help you to solved the problem.

Thank's

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Don't tell me the yoke wires were off or gnawed thru by a roach!

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Take the set to a service center for an estimate. You may find it more feasible to buy a new set depending on the parts that failed and the time involved to do the work.

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