Question about Standard (CRT) Televisions

1 Answer

T.V. has no picture

Yesterday tv turned on normally,mid-morning I noticed a bright horizonal line about 1/4 in.wide centered in the middle running from side to side. Audio is fine. This just all of a sudden happened it was not gradual. Is it fixable or dumpable?? Please HELP!!!!

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 500 questions.

  • Expert
  • 556 Answers
Re: T.V. has no picture

I noticed a bright horizonal line about 1/4 in.wide centered in the middle running from side to side. Audio is fine. This just all of a sudden happened it was not gradual. it is due to vertical section failure. please minimise bright to protect crt. solution. solution 1 check supply to vertical section. 2 check for ic failure in vertical section 3 check vertical output section parts. Is it fixable or dumpable?? Please HELP!!!! yes it is fixable it is common problem not major one. good luck.

Posted on Oct 07, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer



This is called Field Collapse and usually caused by the frame/field output going open circuit and/or the componants that surround that part.

Call a service centre in your locality who put it right (:-)

Nov 22, 2009 | Sylvania Standard (CRT) Televisions

1 Answer

Picture reduced to 1/4 on a black screen

Picture is reduced to a straight horizontal line across the center of the screen.

Aug 17, 2008 | Standard (CRT) Televisions

1 Answer

31'sanyo tv analog has a white horizonal line thru it

There is a failure in the vertical amp section. This can be the main output IC, or any of the support components in this area.

An experienced tech can troubleshoot the set, and determine and service the fault.

Jerry G.

Apr 27, 2008 | Sanyo DS31590 31" TV

3 Answers

Picture tube problem

This problem indicates a defective vertical IC or dry solder joints on the IC connections.

Jan 27, 2008 | Standard (CRT) Televisions

1 Answer

No Picture Has a bright horizontal line with off white & gray vertical bars

The Problem Philips 27TS54 c101 27B800-7562 White horizontal line in the center of the screen. Color is present in the first half inch of the leftist corner of the horizontal line.
Audio is present and controllable. The green power led from a cold non plugged in state remains solid until CRT goes to ignite. A click is heard then the green power LED blinks.
I found service manual diagram of repair part or parts and install instructions
I request any info or tips you might have pertaining to this problem
P.S. 25”-27” CRT board APT187

Possible Answer Posted by PEE_WEE 4/28/2005
On the CRT circuit board(picture tube), you will find R3340, which is a 10 ohm 1/3w resistor. The location of the resistor is printed on the bottom of the ckt board. It is burned open, replace with a 10 ohm 1/2w resistor. This will solve your problem. The original resistor was sized too small, should have been a 1/2 watt. This resistor is mounted standing up on ends. Mount the replacement resistor the same way. Be careful and don't get the circuit trace too hot and damage the circuit trace. (it's very small) The resistor is located on the crt(cathode ray tube), pcb(printed circuit board) socket. The resistor supplies apx +200v to the collectors of the r, g, b, video driver transistors. If this voltage is low, it causes excess brightness(excess beam current), causing the set to "shut-down". If the shut-down is too quick, you will NOT see the excess brightness, because the picture tube has not warmed-up enough to display anything on the picture tube. To see if the set displays "excess brightness", you will need to turn the set "on" about 5 to 10 times. This will heat the picture tube enough to display "excess brightness", IF that is the PROBLEM. Of course, there are OTHER defects that will cause a tv to shut down. There are built in safety circuits, that will "activate" if excess voltage/current or heat is detected anywhere in the set.

My resistors are not numbered the same on my crt board APT187. GSM 02/20/2008

Dec 31, 2007 | Samsung TXK2754 27" TV

1 Answer

Mitsubishis TV Problem

have a Mitsubishi TV 1993. Model CS-35301. The problem is that there is a white line that is running through a blank screen. The sound is fine just no picture. Have you heard of "Vertical Collapse?" I would love to save the TV. Hi nothing to worry just minimise brightness to avoid screen burn. "Vertical Collapse?" means one bright hor.line in the middle of screen. this problem can be solved 1 check vertical yoke connector or wire loose 2 check supply to vertical section which normally comes from EHT transformer check components in vertical section or print loose regards thanks

Sep 10, 2007 | Standard (CRT) Televisions

1 Answer

RCA 32V420T 32" TV

This RCA set uses the CTC187BD chassis. Look on the back of the set and to the right of the cable connector you will see 2 controls sticking out, one on top of the other. The top control is for focus and the bottom one is screen, or overall brightness. If these controls have been turned clockwise then you will have a bright, fuzzy picture with white lines (retrace lines) through it. Tune in a channel with white letters on the screen and turn the top (focus) control until the letters are crisp and sharp. Go into the menu and turn the contrast and brightness all the way down, and then turn the bottom control (screen) until you can just see the picture, just above the point where the picture is too dark to see. Go back into the menu and reset the contrast and brightness and the picture will be back to perfect.

Jun 28, 2007 | RCA 32V420T 32" TV

1 Answer

Horizontal bands

you may have a problem with the vertical output IC.

May 26, 2007 | RCA F27442 27" TV

1 Answer

TV goes black at bottom and has horizonal lines in middle?

Hello, please check the high current area around flyback transformer, horizontal output transistor as well as the deflection connector for bad soldering. Best regards, Arpi If you need more info please advice.

Apr 12, 2007 | Sony FD Trinitron WEGA KV-32FS100 32" TV

1 Answer

Screen split with black bar through center, top of picture shows in bottom

It sounds as you desribe, the vertical output IC and or the b+ feed capacitor off the Hi voltage transformer feeding the vert. IC its required voltage. Not a really hard job to replace, but not for a handi person to do. This should be left to the professional, as there are no user serviceable parts inside this set and with the HI voltage and the safety issues its best to call somesone to assist you with this repair. Good Luck

Jun 14, 2006 | Sanyo DS31520 31" TV

Not finding what you are looking for?
Standard (CRT) Televisions Logo

Related Topics:

211 people viewed this question

Ask a Question

Usually answered in minutes!

Top Standard (CRT) Televisions Experts

The Knight
The Knight

Level 3 Expert

66352 Answers

matt martin
matt martin

Level 3 Expert

1187 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a Standard (CRT) Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides