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.

Posted by reldo on

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Anonymous

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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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Toshiba 32sl410u have 2 vertical lines on screen

Likely a shop repair but:

Either a bad board (main, or power or even a inverter board)

Worst case if Black line and thick would be the panel (screen unit) which would be fatal but is not likely if lines not black.
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Check for dry electrolitic capacitors near the vertical Ic output maybe one of 50v to 100mf or 50v to 10mf
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Horizontal white lines 27A43.

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!
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Most likely there are electrolytic capacitors in the power supply, video path, and scan amplifiers that are starting to fail from age. This is common in many of these sets. In consideration of the age of the set, this may not be worth having it serviced.

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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!
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