Question about Philips Magnavox 20MT133S 20" TV

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The TV keeps going on and off without anyone touching it.The only way to stop it is to turn it off at the mains.

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Check it again may be it is blinking ,how long it stays before it gets turn off ?

Posted on May 12, 2010


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Turntable won't spin. I need a manual; does anyone know where to find one?

Most of these very old turntables used an electric motor which turned a rubber wheel that pressed on the rim inside the platter. No spinning would indicate that either the motor has stopped or the rubber wheel is not touching.
As far as service manuals go I doubt you will find anything on line. Your best bet is to go to a main library in some big city that has a section dealing with technology or mechanical engineering. They might have servicing books for Radio and TV engineers for the 1950's which cover the model.

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TV turns off and immediately on again, by itself.

sounds like a defective str power regulator ic .......but my advice get a tech to resolder all the pins at the power suppy board area, there may be some open pins that triggers the on and off episodes

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The tv just turned off and the power botton blinks

you tv has two boards inside a power supply one and a main one so the main one its the one controlling all your imputs picture and sound too manufacturer and tv repair guys waste of money go to search your tv and model for the main board. The price you r going to be satisfied without complaint.

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I have a problem with my samsung tv

It probably is the Keyboard on the side. I've had this quite a few times. Simply pull off the back and unplug the side keyboard. It should be the last board in a chain of wires coming from the main to the IR sensor then finally keyboard. Unplug the keyboard and then plug TV back in and see if it stops, if so that was your problem, if not it will likely be your main board then. The TV usually can operate without the key board you will just have to use the remote for everything, but the keyboard is generally pretty cheap like $15.

Feb 18, 2010 | Samsung LN40A500 LCD TV

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We have a 18 month old Panasonic plasma HD tv 46 inches. Without anyone touching anything, the tv will start turning the volume all the way up and then the channels start flipping. We've had the A board...

I know it sounds silly, but try changing the batteries in the remote.

Sometimes when the batteries are going dead they cause the remote to send random commands to the tv.

You may want to do the same thing with other remotes in your house.

If it works great, if not, it only cost a couple of dollars to try...

Good Luck!

Jan 03, 2010 | Televison & Video

1 Answer


If it has been moved or bumped recently the sound you are hearing is the main HT lead that has been displaced. TGhis is a blasck lead with a rubber disk surround at its end that fits into the picture tube. Do not touch without turning TV Off and using rubber gloves to reinsert.

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Aug 24, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Lights up 3 times then nothing

ribbin cable that connet main & defl; pull them out & put them back 

Jun 08, 2009 | RCA R52WM24 52" HDTV Projection Television

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This could be 1 of a few things here. Without opening up your set and trying to look at voltages or indiciator lights I couldn't tell you exactly without some more info.

Without looking at it myself here are my thoughts and where I would first look at.

It may be a main board because:
1) Main board processes all your audio/video signals. Bad main board means bad video processing. Could do that. Especially if the main board is not sending the right signal or a bad signal to the rest of the boards so they don't do their jobs. 

It may be a power supply because:
1) Power supply is well, the power supply. If it's sending inadaquete voltage to the main board you may not be recieving enough juice to keep that main board doing your video processing or further up the line keeping enough juice flowing to your TCon board to keep it telling things where to go and what to do. The power supply sends voltages to your Ballast board(controls your lights) and to your main board through which power is supplied to your TCon board via a LVDS line and a +12/+16V signals. If the power supply isn't pumping out enough juice to keep the TCon or Main Board running, it could be a problem. By the same token it could be that your P/S isn't sending power out to your ballast board. 

It could be a TCon because:
1) If the TCon is bad, you won't get your pictures. This could be the TCon board itself or the LVDS cable from your TCon to your Main. However, with few exceptions, if it's a bad TCon you're looking at a total panel replacement. 

It could be a ballast board because:
1) The Ballast Board controls the lighting behind the LCD screen. If this isn't working right you won't be seeing much of anything without that back lighting. If this is bad, it's a panel replacement. These are not field replaceable items by LG. 

Based on the symptoms, without more data or a eyes-on view of it, I would say you're most likely looking at a Main Brd or PSU problem. 

Feb 12, 2009 | LG 42LC2D 42 in. LCD HDTV

1 Answer

No picture and keeps on switching itself on and off

wat is wrong with the tv that keep switching on and off

Jan 22, 2009 | JVC AV-27432 27" TV

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