Question about Toshiba 27D46 27" TV

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Toshiba 27D46 Black Screen - White Horizontal Line

Hi.. I have a Toshiba 27D46 TV. When I first turn it on the picture is perfect but within 5 minutes it goes black with a thin horizontal white line midway across the screen. Anyone have a solution?

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  • puddry2 Apr 30, 2009

    My Toshiba 27D46 "flatlines" too! The Picture disappears leaving only the sound and a thin white line across the screen. The TV is two years only old.. The manual said it was a weak cable signal.

    The cable guy came and said the signal was strong. No help! For a while I could fix it temporarily by turning it off and on again, but now it's completely gone. Anyone know what to do? Puzzled.

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I fixed the problem by taking it to a repair shop

Posted on Apr 26, 2008

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The t con board or LCD panel of the tv is faulty. Can confirm by replacing the t con board.
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Toshiba 27D46 27" TV Problem


it should cost you from $50 for dry solder joints up to about$120 for a rebuild of the vertical stages.

Jul 11, 2008 | Toshiba 27D46 27" TV

Tip

TV shows either: black screen with: white vertical or, horizontal line


If Your screen shows a: white vertical line on a black screen or, a white horizontal line on a black screen:
Your TV vertical or, horizontal power transistor or, chip is getting too hot.
A vertical line indicates the horizontal circuit is at fault, a horizontal line indicates the vertical circuit is at fault.
To troubleshoot: Turn on your TV untill the line shows then: after about a minute, remove power (unplug) the TV, remove the TV back cover, find the too hot transistor or, chip; using component coolant; spray the too hot component with the component cooler until the screen comes back to normal. To fix: apply white coolant cream to the back of the too hot transistor or, chip. or, if there is room, a small fan can be wired in to cool the part. Radioshack sells the cream and, also a "component cooler spray" that should find and, fix this problem, also; with power removed you can, if you feel it is safe; carefully (with only one hand) feel the part; it will be very hot! (it could burn your finger!) Do not touch anything else! (this will not hurt the tv; when the picture comes back on (the offending part has cooled) you have found the problem part.

on Apr 06, 2010 | Televison & Video

1 Answer

Tv problem


Check its horizontal output section circuit for any loose solder terminals. Resolder all suspected solder terminals by applying little more fresh solder. Replace the horizontal output transistor. If this transistor have some leak, it will overheat within minutes will shut down the picture.

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When I turn on the TV with the remote or on the front, it comes on for a second and then shuts off. I was able to keep it on once, and all I got was a horizontal white and colored line across the TV, but...


horizontal lines indicates that the vertical section is most likely the defect..a defective deflection yoke could cause this and eventually damage the vertical output ic causing an overloading in the power supply then can caused to shut down

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Unit has sound, no vertical deflection. caps and output ic ok. have b+ to output. nothing at pin 2 of output ic.


If there's an audio,,it might be the defective Vertical IC...but check first if there's 24v-26vdc supply coming from FBT going to Vcc of Vertical IC.

If there's no Audio,and only white horizontal line in the screen,check the Vertical out of Jungle IC.

Good luck!

Oct 12, 2009 | Toshiba 27D46 27" TV

1 Answer

Intense white & coloured horizontal line on black background on startup


I wouldn't attempt as the capacitors on a tv store around 25000 volts this is more than enough to kill you and they keep there charge even when the tv is off. Either take it to a repair shop or put that money towards buying a new tv - Do not even attempt to open the tv. (It sounds like maybe a tube has gone or the electromagnet that makes the beam move vertically is gone.

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The half picture is a verticale problem. This is difficult to repair. Send to a repair shop.

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I have a Toshiba 27D46 TV that comes on great.. but within 5 minutes goes black with a white line horizontal midway across the screen. Any fix solutions? HELP..!!! Chip

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Hourglass Picture


Pulling in from the sides usually results from poor regulation or width problems related to the horizontal circiut. These are not usually repaireable by a non technician.

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