Question about Toshiba 27A34 27" TV

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Toshiba tv problem

After a recent power outage, my toshiba 27a43 has black, vertical lines down the sides of the screen and no color after about 30 seconds.

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Re: Toshiba tv problem

This looks like a problem either with the powers supply to the video signal processor and with thr power supply to the horizontal section (lack of complete horizontal deflection. This was caused by the voltage and current spikes of the power coming back on rapidly. Now to fix this problem involves coming into contact with hazardous voltages, I would suggest that you not attempt this repair on your own if you do not have a background in electronics. Please take this set to a qualified electronics repair shop

Posted on Sep 20, 2007

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Why does my Toshiba TV Model 27A43 cut off by itself?

Could be from power supply, like a buldge or leaky capacitor

A visual inspection may be necessary to find the clue.

Check for voltages, to determine which supply lines are missing.

Here are some tips

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Aug 20, 2012 | Standard (CRT) Televisions

1 Answer

Horizontal white lines across top of screen. About two inches from the top, some channels more pronounced than others but always there.

Check for dry electrolitic capacitors near the vertical Ic output maybe one of 50v to 100mf or 50v to 10mf

Jul 24, 2010 | Toshiba 27A43 27" TV

1 Answer

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You have some bad capacitors. They are located very near and next to your vertical IC. I would guess you would have to replace maybe four of these! Thanks for asking!

Jun 12, 2010 | Toshiba 27A43 27" TV

1 Answer

Toshiba 27A40 has single colored line across enter

Vertical output has cracked soldering. Around $150 to fix.

May 01, 2010 | Toshiba 32A33 32" TV

1 Answer

Horizonal lines at top of tv screen. what's to fix

If those lines are slightly tilted (diagonal) you may be seeing the retrace of the horizontal sweep which isn't supposed to be visible.
At the loss of some brightness, adjusting the screen voltage on the flyback transformer (large, black block with a fat lead connecting to the forward side of the picture tube) may help but it is likely that there is a (possibly bipolar) electrolytic capacitor is failing. This would be located near the flyback and is marked in some manner as bipolar and will be in the range of 10 - 30 uFd. If you attempt this yourself, it will require a good deal of caution since there are potentially exposed high voltages in this area. Some kind of insulated tool is recommended and the flyback will have two (rarely three) adjustment located on it; one will adjust focus, the other screen voltage.
If you are reluctant to try this yourself, it's OK, this kind of DIY isn't for everyone.

Oct 17, 2009 | Toshiba 27A43 27" TV

1 Answer

Black screen with colorful line going horizontally through the middle of the screen

Problem in the vertical circuitry.
If you have the know-how, check for "cold-solder" joints around vertical i.c.
Also, bad electrolytic caps.
Voltages ok?
Resistor values ok?
Replace I.C.

Don't tell me the yoke wires were off or gnawed thru by a roach!

Aug 07, 2008 | Toshiba 32A33 32" TV

1 Answer

Toshiba 32A40 32" TV Problem

does any one can send me the schematic of TOSHIBA 32A40? I have a vertical problem and I need to locate the vertical IC or trancistor.
I only see a horizontal line on my Tv.


Jul 13, 2008 | Toshiba 32A40 32" TV

1 Answer

Toshiba television

It looks like your vertical IC is defective on your TV set.
I would suggest to use a magnifier glass and check for cold solder joints around high power resistors.

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1 Answer

Toshiba 30" CF0C50

You have a bad capacitor in your vertical area.

Dec 29, 2007 | Toshiba 27A34 27" TV

1 Answer

Picture does not bleed to edge

this symptom is caused by a poor regulation in the power supply circuit. too low dc supply voltage will result to insufficient deflection, both vertically and horizontally. black borders appear around the raster. receivers generally use regulator in the main power supply to set the dc supply voltage at the value that will allow the picture to fill the screen with a little overscan. defective regulator can result in a small raster. most modern receivers today are using ic (integrated cirduit) regulator. but if you are not inclined with this kind of job, better bring it to a qualified tv technician. good luck!

Feb 27, 2007 | Toshiba 27A43 27" TV

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