Question about LG RU-27FB30C TV

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Tv no sound,no picture,fuse ok.

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Re: tv

Check the output voltage on the emmiter of the line output transistor. it should be 95 volts.if not adjust voltage to 95 v and replace trnsistor with a new one-BUT11A and test.

Posted on Aug 24, 2007

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In Samsung tv complaint<br/>in first time tv working in normal and after sometime picture is blinking and slowly no pictre. that time sound is also ok.<br/>after that am am change the capa

Check its solder terminal at the CRT board [Filament voltage]. It sounds like the filament do not glow after some time due to a loose contact at the CRT base connector sockets. Check it.
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No Display, no sound- not working, showing dead. But input Power is ok. Picture tube filamment not getting power. model sony KV-2192M3

Check the input fuse first. If it is blown, there will be some short inside the power regulator circuit. Usually Sony sets uses STR regulated power supply. You can see this STR, and Ic, screwed onto a heatsink. Replace it with a same type and number. Before replacing the STR, check the diodes used in that section for damage, mainlu zener diodes. They might get shorted along the blowing of the STR. Check that section throughly before resoldering the new STR.
If any further assistance you needs, get me through Fixya. Ok.

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No sound

You haven't mentioned about the picture at all. Assuming that, picture is ok I suggests. Ok
If the picture is Ok and there is no sound output from the speaker, your TV has either speaker problem or output Ic problem. To assure where is the fault, you just place your ear very near to the TVs speaker side, and switch on the TV. If you hear a "thumb" sound or a "HUM" sound, your TVs output ic has blown out. If you did not hear any sound at all, the speaker of your TV has gone.
If you have a little knowledge in electronics, you can do it by yoursef. This is a minor mistake. Opwen the back cover of your TV, locate and note the type and number of the audio output Ic, go for that and get it replaced; if the fault is related to Ic. You can do the speaker replacement also by this way. I have given this much advice, assuming that picture in your TV is Ok. Otherwise the fault may be different.

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2 Answers

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Yes, change the tuner and make sure that all ground are well connected.

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HT transistor, or rectfying diode from chopper transformer is blown.

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Tv turns on and turns off after 5 seconds

jim if know how to soldering iron ,resolder your tv especially the power supply

Jan 26, 2009 | Standard (CRT) Televisions

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try to fine tune your tv using the remote control, or, if you had knowleged in electronics adjust the sound IF transformer using a wood stick or plastic don't use a metal in adjusting the IF

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1 Answer

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A good visual inspection is a must...look for spill area...clean
with q-tips and de-natured alcohol.......if it makes a sound, then
the AC input fuse is ok.....................T.

Dec 25, 2007 | Sylvania 6427TE 27" TV

1 Answer

Sansui tmv1916 tv no pic

have a sansui tv with a date of sept 2002 i bought the tv because it was on sale and have since lost the reciepts. anyways , no i need the tv and when powered up there is no picture but the sound comes on fine. i turnd it upside down and beat it and shook it and the pic came on for a min only to turn back off in 5-6 minutes. help. oh and i dont have electrical or circuit knowledge but willing to change a bulb or fuse. as you say that sound is ok and picture also comes some time so please check loose contact in luminance section of chroma ic . weak signal may cause rolling and intermittant picture problem for that checkloose near antena socket thanks

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