Question about Sanyo DS24424 24" TV

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TV problem The TV is coming on standby but the screen does not light.I tried to check the line transformer and the line transistor and i found them good.tell me another solution.

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Re: TV problem

This is an indication that you have an overcurrent issue and the shutdown circuit is turning your TV off to protect it. Now this problem can only be worked on by someone that knows TV repair. I would suggest that you take this TV to a qualified electronics service technician.

Posted on Sep 11, 2007

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The TV just went off whilst watching

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.

Apr 03, 2015 | Standard (CRT) Televisions

1 Answer

Ticking tv

Line Output Transformer to be suspected. Check the horizontal output transistor. If it found good, replace Line Output Transformer.

Apr 06, 2012 | JVC Standard (CRT) Televisions

1 Answer

We replaced the transformer for our RCA F27650. It was sparking and now it is not, but now the screen won't turn on. It is just black. We hookd all the wires up like they were. we can hear sound, but...

Along with the flyback transofrmer, its horizontal output transistor also must be replaced. I don't know whether you have replaced it or not. If not, replace it too. It can be located very near to the flyback transformer, a three terminal component, black in colour, usually screwed to a metal heatsink. Then switch on the TV and measure the video output voltage at the video output card pluged directly to the picture tube neck. The collector of the video aoutput transistors must come around 145VDC. If it also is there, advance the screen control on the flyback transformer to get a raster. If that voltage is not there, it means that the flyback transformer is not working, and horizontal oscillator stage should be checked for oscillation, check the lined drive transformer for its primary winding open, Check the entire horizontal oscillator section. The collector point of the line drive transistor, the transistor that drives the line drive transformer, a small transformer soldered diretly to the printed circuit board; should be checked with frequency meter. The frequency at that point should come around 15525HZ approx: OK.

Mar 19, 2011 | RCA F27650 27" TV

2 Answers

Sharp tv primo 21`inch turn on red light only

check your horizontal transistor maybe it's shorted replace horizontal transistor or maybe the fusible fuses are open check for open resistors at the horizontal section of the circuit.

Dec 22, 2010 | Sharp Standard (CRT) Televisions

1 Answer

The standby light flashes and the tv will not come on

check the power supply, its not giving out the required voltage output. if you cant repair a tv plse take it to a workshop, ask a technician to make sure that he checks the following components.
power diodes and transistor, fusable resistors around the power supply, and zener diodes.
he should make sure that an ht of 95-110 volts appears on the line transformer. later a transformer will produce various voltages to trigger other voltages to open up your tv. thanks

Mar 26, 2010 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer

My sony trinitron kv-32v65 has no picture - standby light blinking - sound works through the bose sysytem, just no picture - help

if you cant repair a tv take it ot a w/shop and have it checked. let your tech check that an ht voltage of 95-105 is reaching a line transistor, also a transistor be checked for leaks, also let him check a line transformer, and the surrounding tin capacitors for leakages and change of values.

Mar 11, 2010 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer


check the line transistor near the line transformer
and make sure that 90-115 volts is reaching a transformer.

Feb 22, 2009 | Sony FD Trinitron WEGA KV-24FS120 24" TV

2 Answers

Standby relay clicks on and off continusly. Tv won't turn on. I check my diode and transistor who control the standby relay and it is fine. I also replaced the flyback and I still in the same situation....

Hi there!

You have an obvious error state on the unit. You may want to try and remove the Line Transistors to check for voltage first. In the region of 145V(between base and collector. If the set then stays in standby you may have a vertical error. Also check 5V rail to the processor and suspicious looking components like caps. Good Luck,JUS004

Mar 05, 2008 | Sony KV-27S15 27" TV

1 Answer

No power even standby LED..

This is like a car running without a driver,the horizonatl output transistor has the voltage it needs but it does not have horizontal drive signal applied to the base of the horizonatl driver transistor,the driver transistor should have a signal coming from the signal processor where the signal is generated just to get give it to the driver this driver then it gives it to the output to energize the flyback and light up the picture tube and generate a few other supplies,158 volts are there because the output is not turn on,try measuring voltage somewere else in the set and not at the collector of the output,there is a b+supply that goes to the signal processor(8 to 12 volts),check to see if you have this voltage,I couldn't tell you the pins in the siganl processor IC without squematic,It seems you know your way around tv service but be careful when checking voltages.Let Us know if you need more information.

Oct 10, 2006 | Samsung TXJ2067 20" TV

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