Question about Quasar SP-2723 27" TV

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Horizontal line problem

My tv was left on when power went off then it come back and off again then back finally the tv screen was black with a white horizontal line between it. what could be the problem?

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  • 62 Answers

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

2. solder the yoke wires.

3. replaced the vertical ic supply capacitor.

Posted on Oct 14, 2008

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Any idea on what is causing these issues with Vizio TV? Black lines horizontal, shadow vertical.


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent. Line faults to all LCD TVs will be similar, irrespective of its screen size and brand.

Jul 27, 2015 | VIZIO M701d A3R 70 Inch 1080p Smart

Tip

If Your screen shows a: white vertical line on a black screen or, a white...


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, carefully using your finger find the too hot transistor or, chip; or, use component coolant; spray the too hot component with a component cooler repower the TV, until the screen comes back to normal. To fix: apply white sylicone 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 | Garden

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

Black and White Horizontal Lines


Sounds like the graphics card just died. You will need that repaired.

Apr 15, 2014 | Apple iMac Computers & Internet

1 Answer

TH-42PX75U horizontal lines (flickering black and white)


The controller board for the screen is going bad. check shopjimmy.com for replacement parts. It's not a difficult job to do. Once the back of the TV is removed, you'll see it near the center of the screen.

Feb 21, 2014 | Panasonic VIERA Televison & Video

1 Answer

No picture, has sound. Black screen with green lines.


Probably a power supply issue in a 7-year-old TV

Feb 13, 2014 | Sharp LC Televison & Video

1 Answer

Wavy horizontal lines across the screen


It sounds that the main power supply section to your TV has the fault. The horizontal thik lines that appears crawling down across the screen should be of video 'HUM'. Have you replaced the main filter capacitor at the power supply section? If not, replace it along with the main rectifier. The AC power is rectifed by a bridge and applied ot this main filter capcitor. It will have a capacitance value between 120 to 350MFD 450VDC. Check this section. Measure the rectifed DC voltage acorss this main filter capacitor. It should be around 350VDC, if your home power supply line is 220VAC. If it is 110AC, this DC voltage will be around 165VDC; and it should be. If rectified DC voltage found lower than the input AC voltage, replace the rectifier bridge. In some sets, this bridge section have four diodes. Some other circuits, a bridge rectifier stalk may be used.

May 20, 2012 | JVC AV-27050 TV

1 Answer

I have a Samsung LN46A650 LCD TV and recently I started getting a white line across the top of the screen. Sometimes the white line is thicker on the left side of the screen. Sometimes after the white...


Yes, it's the t-con board, a well know problem in this tv. Here it is
http://www.partstore.com/Part/Samsung/Samsung/LN46A650/Samsung/Samsung/BN8101697A/New.aspx

Sep 13, 2011 | Samsung LN46A650 46 in. LCD HDTV

2 Answers

I went to turn on my Vizio and the scrren was


Do you have back light when turning on the TV? if you do then just replace the main board should resolve the problem. if you do not have back light, you will need to replace the inverter board(s) depending on your model. The inverter board(s) is located on the left side of the TV facing back of TV. you may have two inverter boards depending on your model. the other is located on the right side of the TV. Both mount vertically.

Jun 17, 2009 | Vizio L32 32 in. LCD HDTV

2 Answers

Black Screen with horizontal lines


are u sure that ur not able to see the fone's stand by screen now?its totally black?are u sure that there's no problem with the screen itself,the care guys might have left the screen connection loose. other wise try one thing,Format ur fone. by pressing *#7370# u have press keys once wait for 5 seconds and press the left selectin key [where u get the YES option normally. the fone would restart and lets see are u able to go back on the screen. IF YES then u can set the Sleep mode to off cuz the sleep mode gets inititated after 20 minutes when u keep ur fone idle means u dont operate ur fone for atleast 20 minutes. BUT IN THIS CASE ULL LOSE ALL UR DATA INCLUDING CONTACTS AND MESSAGES ETC.IF U HAVENT TAKEN THE BACK UP EARLIER.so its totally upto u that u want to proceed with this step or u can again show ur fone to the nokia care guys. but they'll charge u cuz obviously after 2 years ur fone is out of warranty

Oct 05, 2008 | Nokia N73 Cellular Phone

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