Question about Philips Magnavox 27MS343S 27" TV

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Tv has sound at all times but picture fades, have to tap on large circuit board to get it back on

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That would be a sign of intermittent solder joints on the board. It would be fairly easy to repair the set by touching up any connections that needed it. If you don't have the tools and skills for electronic soldering, a TV shop could do it. I have no idea what a typical labor charge would be these days. I've been out of the shop now for a few years.

Posted on Apr 12, 2009

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I have sound and the picture pops up right when the tv starts up but then fades to a very very light color (almost totally black) and volume continues.


Back - light problem indeed. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
Some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

Aug 08, 2015 | Televison & Video

1 Answer

The color on my Advent TV fades in and out of the picture, and goes to black and white Why


The problem is in the picture tube board circuit. Sometimes the CRT socket doesnt connect well to the CRT pins. Or maybe there have bad solders from RGB transistors. check those transistors, Also the bad thermistor discolored the entire tv screen.

Sep 29, 2014 | Televison & Video

1 Answer

Rca R52wh74 red crt dim or not working well at all


Put a meter on the heater circuit output to the tube and see if the voltage fluctuates. Sounds like the voltage regulator IC on that circuit is bad.

Sep 28, 2014 | Televison & Video

1 Answer

I own a Panasonic PT-60LC14 DLP TV. After the tv has been on for awhile, the red color drops from the picture. I have to turn ther tv off and then on again to get it to come back. Has anyone had this...


i used to be a tv technician.it sounds like an intermitent fault,which only does it sometimes.most likely cause is dry joints on circuit board,which is faded or discoloureded solder.try resoldering dry joints ,faded or discoloured solder on circuit board.as its an intermitent problem so it sounds like dry joints on circuit board which is faded solder,which means only half of the current is passing through the circuit..resoldering will allow the full current to go through circuit.

Feb 25, 2012 | Panasonic Televison & Video

1 Answer

Possible water damage to the picture tube/ window was open when it was raining and possible wet the picture tube, television was off but still warm, when we cut the tv back on the picture begain to...


Any pop or loud noises sound when tv turn back on possible have water damages into it circuits boards components.No.Tries take the tv aparts leave it closed by to the portable heater unit turn it on high like 1-2 hours.Might get the tv work again,if tv have no components parts damages or dead.

Jul 26, 2011 | Televison & Video

1 Answer

TV picture randomly fades to black. Bang on sides and pix comes back for few monents b4 fading out again. TV works great except for this one little problem---no picture.


You have an aging TV with a very common problem . The board inside by now has many bad solder grounds. The grounds would inculde resoldering the vertical IC chip. It is located on a large heatsink. And check solder grounds on the horizontal output transistor also mounted on a heatsink. The horizontal transformer is another suspect, resolder this. Check for grounds on large resistors and the flyback transformer. Also make sure there is a good connection on the suction cup that is mounted on the back of the picture tube. Please be careful when checking the connection on the suction cup..quite a powerful shock. Also be sure you have good solder grounds on the small board that is connected to the picture tube. This should restore the video on your TV. Be very careful and good luck. Thanks for asking and show a few hands of support.

Dec 15, 2010 | Mitsubishi CS-36309 36" TV

2 Answers

My 72hm195 color fades then picture jumps now i


Ur LCD inverter board it dead,U replaced this board to get picture back.It usally aa long board.

Jan 27, 2010 | Toshiba 72HM195 72" HDTV

1 Answer

When i turn on tv, i get a picture for a second or two, then it fades to all blue screen, which lasts a second or two, then it fades to black. also, the stand-by red light flashes.


look for bad solder it sound like you g2 is drop off
if you open the set and have some stand in front of it you tap the board to see if pix come back if it do them you have bad solder you can see the g2 on your pix tube
the g2 will not be lit up at this time.it a g2 pro.

Dec 07, 2009 | Sony KP-57WV600 57" Rear Projection...

2 Answers

VS 5001R sounds like its gonna turn on but doesnt


This chassis model line had issues with the vertical output IC shorting causing shut down.
It also had issues with intermittent solder connections in the Horizontal Circuit. I would not try to fix it your self unless you are very familiar with Projection circuitry and electronics background.
Hope this helps,
Skyassoc

Jul 02, 2009 | Televison & Video

2 Answers

Picture clear then fades to snow when it does, makes annoying sound


sounds like poor solder on the ground conections of the tuner, depending on the age of the TV frostman

Feb 11, 2008 | Sony KV-27FS13 27" TV

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