Question about Toshiba MW27FN1 27 in. TV/VCR/DVD Combo

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Screen problem My TV recently developed about an inch long area at the top of the screen of close together white horizontal lines. I'm wondering what this could be and how expensive of a problem it is to fix. This TV is only 2 years old. Thanks for any help! Lori

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SOURCE: Screen white line problem.


Posted on Jan 02, 2008

  • 4 Answers

SOURCE: Screen white line problem.

There are two capacitors in the vertival output circuit that need replaced

Posted on Jun 19, 2008

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Samsung TSL2793HF - Slight Right Side Pincushion and Horz Line Bottom to Top Until the TV Warms up

Yes, this is rare but I have seen it before--not fixable if it is what I think it is----It is what is called a Dome effect---the shadow mask in the picture tube is actually contracting and or expanding depending on temperature---

Directly behind the phosphor coating (the stripes that you see on the screen) is a metal screen--the holes or perforations in it line up with the stripes on the phosphor screen.

Some masks either have a material or a defect causing the dome effect----Not likely to be anything else---a Pin amp problem will not usually act the way you describe but a shadow mask inside the picture tube will act exactly that way.

Dec 02, 2012 | Combination Televisions

1 Answer

Ther is a white horzontal line in the middle of my tv and i dont hear or see the screen

he white horizontal line with no picture is ususally caused by a failed Flyback transformer in CRT type TV's
repair cost about $200

please rate my help++++Thanks for using FIXYA

Jun 23, 2010 | Combination Televisions

1 Answer

White horizontal lines on top of my tv.

This fault is most likely from some worn capacitors in the vertical output section. An experienced service tech can troubleshoot the set, locate the defective capacitors, and change them for you.

Jerry G.

Jan 19, 2010 | Toshiba MW27H62 27" TV/DVD

1 Answer

CRT TV, horizontal line appears, got sound, no picture. Sometimes a good whack brings back a perfect picture, then after a short time, picture disppears into the single horizontal line across the screen....

You have a poor solder connection in the frame output stage. If you have a soldering iron, remove the back cover & look for an IC that will be attached to a metal plate that acts as a heatsink. Carefully re-solder the pin connections on this IC ensuring you dont leave any of the pins shorted together. If you spot any other connections around about this area also looking dry, then resolder them as well.

Oct 19, 2009 | Sony Combination Televisions

2 Answers

White lines accross top of screen on our 27 inch Toshiba,

lcd or plasma.
are the lines solid or blurred. do they have sharp edges.
You may have a memory problem with the display which can only be repaired by factory trained technicians, or a brave soul willing to find parts on ebay.

May 02, 2008 | Toshiba MW27FP1 27 in. TV/VCR/DVD Combo

1 Answer

White horizontal lines at top of picture

Yes, definitely worth fixing. The problem lies in the vertical deflection voltage-doubler circuit. The usual fault is a single capacitor of 100uF/35V that has failed. It is normally connected to a rectifier diode right at the vertical IC. Replacing the capacitor (no more than USD4.00 in price) usually gets it working perfectly again. If you are finicky around technical work, then a reputable local repair shop in your locality should do it quickly for you and charge only labour.

Jan 17, 2008 | Toshiba MD24FP1 24 in. TV/DVD Combo

2 Answers

Screen white line problem.

There are two capacitors in the vertival output circuit that need replaced

Oct 19, 2007 | Toshiba MW27FN1 27 in. TV/VCR/DVD Combo

1 Answer

Several dozen thin horizontal white lines across the top of screen, all channels

These beasts are monsters to get into and service without the proper extenstion cables and a service manual. there are no user replaceable parts inside this set. if you know solid state serviceing, you can try and fix it. There is a bad capacitor or capacitors in the vertical sweep circuit and or the vertical output IC is bad also. If you can solder and unsolder go for it. But if you do not or know how the circuit Works Please find a trained tech to assist you with this repair. Good Luck. PS please do not forget to rate this.

Oct 14, 2006 | RCA 27F500TDV 27 in. TV/VCR/DVD Combo

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