Question about Toshiba 27A34 27" TV

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Toshiba 30" CF0C50

I get a flat horizontal line in center of screen with TV picture showing thru this tiny flat line - it remains on there for about 20 minutes after tv is turned on and then goes to full screen. What's up with that?

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  • busa-1 Dec 02, 2008

    tiny horizontal line across center of screen, 19" LXI telivision

  • Anonymous Mar 27, 2014

    need to know how to reset a Toshiba regza 42 inch flat screen tv



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You have a bad capacitor in your vertical area.

Posted on Dec 29, 2007


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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.

on Apr 06, 2010 | Televison & Video

1 Answer

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

The controller board for the screen is going bad. check 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

Horizontal lines shadowed / blured picture after 20-30 minutes

There are some semiconductors or capacitors that are leaky. Might need thorough check up inside the TV.

Jul 07, 2012 | LG 55LH40 55 in. LCD HDTV

1 Answer

My Toshiba 46XV540U LCD TV. Has ghost image plus many white vertical and horizontal line when it is turned on. These lines and the ghost image stay for 20 to 30 minutes and than the picture becomes clear....

Tries websites like, to buy a refurbish board that call T-CON board to do a replacement.This T-CON board sit in the middle at the bottom of the tv LCD screen panel.This T-CON board control all the picture pixels going throught to the tv LCD screen panel.

Jun 11, 2011 | Toshiba 46XV540U 46 in. LCD HDTV

1 Answer

Our LN40A630 has three horizontal white lines across the screen on power up (center, center of upper half , and center of lower half). After about five minutes the lines go away. Tried Picture Test in...

This is a sign of your LCD panel beginning to die. Sometime soon those lines won't fade away and will become permanent parts of your TV screen.

Considering the fact that your TV is approx 3-4 years old, this is normally the expected lifespan of a TV. Once the TV becomes unwatchable, your best bet would be to begin shopping for a new one.

Mar 07, 2011 | Samsung LN40A630 40 in. LCD TV

2 Answers

There's 4 horizontal white tiny lines appear on screen to make the picture become 4 equal parts from top to bottom with many horizontal lines. My TV is Toshiba Lcd(40RV52U)

You have failure/weakening in the vertical section , the retrace lines appear due to the change in the freq.
Check out small value capacitors in this section. confirm by shorting parallel with the right polarity. Unless you are familiar with electronics please do not attempt unless with help. the fault is not very serious and could be attended with low expense.

Jun 30, 2010 | Televison & Video

1 Answer

My toshiba problem.

You may have bad T-CON board, try cooling it with small fan blowing on the vents of the TV.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Please see my basic troubleshooting guide here:


Jun 30, 2010 | Toshiba 40RV525U 40 in. LCD TV

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