Question about Toshiba 32A50 32" TV

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My tv have one line white horizontal - Toshiba 32A50 32" TV

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The vertical output integrated circuit (Q301, mounted on a heatsink roughly in the middle of the main circuit board) isn't working. This is frequently because of bad solder connections, which is an easy repair if there are no other parts needing replacement. However, the device itself may have gone bad or there may be power supply problems. It's not unusual for other parts around the IC to go bad first and cause the IC to fail.

You can try resoldering the connections to Q301. If that doesn't bring the picture back, or there are other pictures problems afterward, you can see what a TV technician would charge to repair the set. I always liked the Toshiba picture quality, so if everything else was working properly and you were happy with the set it might be worth the cost of fixing it.

Posted on Mar 25, 2011

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Posted on Jan 02, 2017

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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.

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Where is horizontal scan out put section?


Hi Majid
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Hi.. Mine is a sansui tv and I bought it 3 years back. Now it is showing a horizontal line on the screen. Sound is fine but I can't see the picture, I just see one white horizontal line on tv...


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1 Answer

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1 Answer

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