Tip & How-To about Televison & Video

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.

Posted by on

Televison & Video Logo

Related Topics:

Related Questions:

1 Answer

Model 42LG70. Why is nothing on screen except for horizontal green and pink pixel line?


Black square on the screen Vizio Gallevia 47" 1080p - Fixya

www.fixya.com/support/t355299-black_square_screen_vizio_gallevia_47
Jan 16, 2008 - Black square sized app. 10"x10" pops up on the bottom right corner of the screen and won't go away. .... Model 42LG70. Why is nothing on screen except for horizontal green and pink pixel line? I am looking at replacing the ...

bad screens display vertical lines with a white background ...

https://www.ifixit.com/.../bad+screens+display+vertical+lines+with+...

iFixitJun 17, 2014 - I am now replacing a screen on a different G2 and I am on the secondscreen. ... A touchscreen smartphone made by LG Released: 09/2013 Model: VS980..... on the rigth side, from the top to the botton has 6/7 black lines.Missing: 42lg70 ‎pixel

Broken LG LCD TV Capacitor Black Screen My Wont Turn ...

? 6:27
https://www.youtube.com/watch?v=EbGiXqBAvvo
Aug 25, 2010 - Uploaded by FixItUrselfDummy
Broken LG LCD TV Capacitor Black Screen My Wont Turn On ...How I fixed my LG TV, Won't turn on or show picture Model: LG42LC7D ...Missing: horizontal ‎pink ‎pixel ‎line

Jan 05, 2016 | LG Televison & Video

1 Answer

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...


The problem is vertical failure. Vertical output section to your TV ahs the fault. You ahve to check the vertcial output circuit for any component failure or loose solderings.

May 11, 2012 | SansuiS3275 TV

1 Answer

Horizontal line problem


1. solder the vertical ic first. otherwise replaced the vertical ic.

2. solder the yoke wires.

3. replaced the vertical ic supply capacitor.

Jun 26, 2008 | Quasar SP-2723 27" TV

Not finding what you are looking for?

360 people viewed this tip

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

73619 Answers

Cindy Wells

Level 3 Expert

5056 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

Are you a Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Loading...