Question about Toshiba 27AF43 27" TV

3 Answers

White lines at top of TV

I have white lines at the top of my TV which come down approx. 2 inches. I've read around the site and found that it could be a problem with the Vertical Output. I took the TV apart, and noticed that this Capacitor (C521 on the board) had some white stuff that appears to have come out of it. Does it mean it's blown and that it is my problem?

I took some pics:

Any info on this would be great...

Posted by on

3 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers

I had the same problem with horizontal white lines about 4 inches at the top of my 5 year old 27AF43 Toshiba. Solution, I found by google was to replace C407 but no directions. Here is how I did it.

First is to locate a new polarized 100uf 35V capacitor. I was able to buy 5 of these at a local electronic parts store for $2.50.

Next is to open up the TV. Turn off the TV and unplug all wires, place TV screen side down, remove the seven large screws, three on each side and seventh a couple of inches up from the bottom and about nine inches in from side. Then remove the two small screws in the area where the cables plug in. Gently lift off the back cover.

Put a large magazine or newspaper over the bottom part of the picture tube to protect if from scratches.

Next is to pull out the cicuit board at the bottom of the TV, it's the only one. Clip the cable ties holding some of the wires to give more freedom of movement and then gently pull up on the board. It doesn't need any fidling with clips or tabs or such, just pull straight up. You don't need to disconnect any wires.

Then locate capacitor C407. It is black and marked on the cicuit board and is 3 1/2 inches in from the edge and right by the corner of a heat sink. It will have 100uf 35V written on it. Note which side is the negative (this is important). It will be the same side as the other capacitors close to C407.

Next is to replace C407. Take some measurements from the edges of the cicuit board so you can locate C407 (from the bottom) and then flip the board over and locate C407's leads. Draw a circle around its leads with a felt pen. Us a fine tipped soldering iron and a solder ****** to remove the solder. Be careful with this. Might take a couple of goes but eventually you will beable to wiggle C407 and it will come out.

Put the new capacitor in and make sure the negative is on the correct side (this is important). Solder the two leads and be very careful the solder doesn't bridge between the two leads. Let it cool for a few minutes then use a pair of side cutters to cut off the excess leads.

Slide the circuit board back and push gently down until it snaps into position.

Remove the protective magazine or newspaper.

Use a couple of new cable ties to replace the ones you cut.

Replace the back cover being careful that the power cord is positoned correctly into its little notch. Replace the two small screws and the seven large ones.

Reattach the cables. Cross your fingers and turn on the TV. With luck your white lines will be gone.

Good luck


Posted on May 05, 2009

  • 1 more comment 
  • brgibson Aug 27, 2010

    Hi, I noticed that the sticker on the tv warns about shocks. My friend has a Toshiba 27AF43 with this problem and would like to replace the capacitor that you suggested. However, he would like to know if there are any other capacitors that may have voltage stored up or any part of the circuit board you should not touch, to avoid an electrical shock. Thanks for any suggestions.

  • ve6imb Sep 12, 2010

    Be careful of electricity. I am not an expert. I let my TV sit unplugged for about four hours before fooling with it and did not get shocked.

    Good luck


  • Brett
    Brett Feb 11, 2011

    As a motorcycle tech, not an electronics wiz, I found your descriptions and instructions crystal clear. Along with a little advice from Youtube and the electronics store, I was able to put it together cleanly and cheaply.
    Now we can use this TV for at least another year while saving for a more current LCD TV that will carry us into the next generation of digital media.
    Thanks Brian!


  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Same problem on a Toshiba 27DF46 fixed by replacing capacitor C407 (100uF 35V.) The faulty capacitor looked absolutely normal, no bulges or leakage.

Posted on Oct 14, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I love you guys. i replaced c407 & 408. since the lines were stationary, i replaced the V.O. ic as well..was getting ready to change c407 but googled it first and found your same solution. i felt confident as i changed the cap and sure enough, it fixed it! thanks to all!

Posted on Dec 04, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Ihave pinky white lines down left side of tv about 2 inch wide and 8 inch long

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Apr 02, 2015 | Televison & Video

1 Answer

Printer ignores white space at beginning of document

0c2c2cf.jpg 437e2b1.jpg
by dragging the black bar on the left with your mouse when
the cursor changes for resize

Nov 30, 2007 | Office Equipment & Supplies


Building your own light box at home

I've recently gotten into selling items on ebay and I've found that products that have images with a white background sell more quickly than those that have a lot of stuff in the background. To acheive this impression of profesionally photographing these items I built a light box from a few items that you usually have lying around the house or can get cheap at a local home improvement store.

First you are going to need a cardboard box, it should be big enough to fix the item that you want to take pictures of. Take a ruler and scissors, measure and cut out a square about 2 inches from the edge of the box all the way around on the four sides leaving the top and bottom of the box alone. Then using white poster paper line the inside of the box. With another piece of poster board cut it to the width of the box and leave it longer than the height of the box, you wan the poster to curve in the bottom of the box but not crease. If it creases the line will show up in your pictures. Then you have to cover the top and sides of the box using a thin white fabric (it can be an old bed sheet doesn't have to be something fancy) use tape to hold the fabric in place. Make sure to leave one side open so you have somewhere to put the camera. Finally you need a bright light, like a desk lamp then you are all set to photograph like a pro!

on Sep 17, 2013 | Crafts & Hobbies

1 Answer

I have got Samsung Plano 29 inch tv. I see redgreen and white color lines at the top of the screen.this slides down till the middle of the screen. Please suggest

I have got Samsung Plano 29 inch tv. I see redgreen and white color lines at the top of the screen.this slides down till the middle of the screen. Please suggest

May 11, 2010 | Televison & Video

1 Answer

White lines on the top 2 inches of screen there

You Probably have some failing Electrolytic Capacitors in the Vertical circuit. it will only get worse and can cause the circuit to fail
all together if not fixed. Unless you are Electronically Savvy and know you way around TV circuits do not attempt to repair. Call a professional.

Jun 16, 2009 | Toshiba 27AF43 27" TV

1 Answer

Philips 27PT6441 27" TV Problem


Pls note that my experience is with the phillips 27" model27PT6341/07. It may not be the same board as yr model, as I can't remember nor find the service manual anymore. (browse around online for it though)

However, after taking the back off. Look close to the rca jack and svideo connection. Mine is located about an inch from the svideo connection.

Here are some pics that may help you.

The new one is the black and gold one marked 10uf 100v in the pic.
Other users have advised to go as high as 10uf 250v, to avoid having the cap overload again.

PS. I had the lines for about 2 weeks. They got steadily worse then one day my tv looked like it was broadcasting an hourglass. The lines converged in the center and flared outward (no pic).

Sep 10, 2008 | Philips 27PT6441 27" TV

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

Tv help!

When you have the back off, look for the flyback (high voltage) transformer. This is the part that has the thick red wire protruding from its top which attaches to the top of the picture tube with a suction cup. On the flyback there are 2 controls, the bottom one is screen and the top one is focus. Turn the bottom control (screen) down (counterclockwise) until the white lines go away and the brightness looks normal. Then turn the top control (focus) until the picture is nice and sharp. If the F connector has been pulled out and the TV has RCA (red, white, yellow) jacks, use those jacks and set the TV to INPUT.

Aug 13, 2007 | Zenith A27A11D 27" TV

Not finding what you are looking for?
Toshiba 27AF43 27" TV Logo

1,056 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Televison & Video Experts

The Knight
The Knight

Level 3 Expert

72640 Answers

Jaime Hernandez

Level 3 Expert

2296 Answers

Henry  Thomas
Henry Thomas

Level 3 Expert

1074 Answers

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

Answer questions

Manuals & User Guides