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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5 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

premtech
  • 934 Answers

SOURCE: horizontal line

Olao,
Your symptoms suggest that your vertical Ic401 has failed. In your Tv that Ic is a LA78040N-E Toshiba p/n# AE002783. Also it would be wise to test the feeder caps in that circuit, especially anything in the 100uf range.
This is not an expensive repair for a qualified shop. The Ic is under $20.00 dollars and caps are a buck or two - the labor will be your most expensive element of the repair and it shouldn't take an hour start to finish..
Hope this helps!
Bill

Posted on Dec 01, 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

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