Question about Polaroid FDM-0700A 7 in. TV/DVD Combo

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FDX-0700T has no picture

The picture is missing the backlight. I realize it is high voltage but I am willing to go in. Is there a schematic available any place for this. I would rather not go in blind. If I do though what voltage should I have going to the light. Thanks

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Re: FDX-0700T has no picture

Here is a website that offers a replacement inverter board that will fix the backlight issue on this monitor

Posted on Aug 21, 2009

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Re: FDX-0700T has no picture

When I put a dvd in the player it will play but you can't see it.

Posted on Dec 24, 2008

Re: FDX-0700T has no picture

Try this site

Posted on Jun 19, 2007

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Re: FDX-0700T has no picture

You should contact polaroid and see if they have a schematic for the backlight circuit as Im sure they do but wil they sell or give it up as alot of these things are a made by someone else and the distribution conpanys not allowed to give out any info on the units! Good Luck . Oh and heres a contact # 800-268-6970

Posted on Jul 25, 2006

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1 Answer

Sound but no picture

This indicates a failure in the horizontal output section where the high voltage for the CRT is produced and the deflection signal for the horizontal sweep.
Some parts may be available for this set although it is doubtful whether the flyback transformer is still made. Some parts for you set can be found here:
TV parts

Mar 07, 2011 | Toshiba MW20FP1 20 in. TV/VCR/DVD Combo

1 Answer

Tv turns off after 30 sec. - 2min.


If you can turn it back on with the s momentary key or power button:

When it shuts off, do you need to push the power button once or twice to get it back on? Also, does anything else about the picture or sound change as it warms up?

If once, then the controller is shutting the TV down either as a result of a (thermally induced) fault in the controller or it sensing some other problem. Monitoring the voltage on the relay coil (assuming these is one) could help determine what is happening. The controller thinks it is in charge.

If twice, then the power supply is shutting down as the controller still thinks it is on and you are resetting it. A couple of possibilities here would be low voltage or high voltage regulation error (excessive high voltage is sensed and causes shutdown to prevent dangerous X-ray emission). A partially dried up main filter capacitor could also cause a shutdown but there might be other symptoms like hum bars in the picture just before this happened. Clipping a good capacitor across the suspect (with power off!) would confirm or eliminate this possibility.

If it uses a pull-knob (or other hard on/off switch), then this may be like pulling the plug and would reset any abnormal condition.

Jun 01, 2010 | Toshiba MD20F51 20 in. TV/DVD Combo

1 Answer

How do you fix a ps42p7 plasma tv that has sound and no picture. i have checked the cables and changed tv's and it is not any other source for the problem.


The screen is blank with no raster at all. There are indications that the channel numbers are changing in the display. This indicates that some of the low voltages are present but these may be derived from the standby supply.

Assuming there is no deflection and no High Voltage , you either have a low voltage power supply problem, bad startup circuit, or bad horizontal output transistor (HOT) or other bad parts in the horizontal deflection.

Check for bad fuses.

(If you have High Voltage as indicated by static electricity on the front of the screen and you hear the high pitched whine of the horizontal deflection when it is turned on, then the following does not apply).

Use an ohmmeter to test the HOT for shorts. If it is bad, look for open fusable resistors or other fuses you did not catch.

Assuming it is good, measure the voltage on the collector-emitter of the HOT (this is safe if there is no deflection). You should see the B+ - probably between 100 and 150 V.

If there is no voltage, you have a low voltage power supply problem and/or you have not found all the bad/open parts.

If there is voltage and no deflection (no high pitched whine and no High Voltage), you probably have a startup problem - all TVs need some kind of circuit to kick start the horizontal deflection until the auxiliary power outputs of the flyback are available. Some Zeniths use a simple multivibrator for this - a couple of transistors. Others power the horizontal osillator. IC from a special line-derived voltage. The multivibrator type are sometimes designed to fail if someone keeps turning the set on and off (like kids playing) since the power rating is inadequate.

Test the transistors if it is that type with an ohmmeter. If one is shorted, you have a problem. The usual way a TV service person would test for startup problems is to inject a signal to the base of the HOT of about 15.75 kHz. If the TV then starts and runs once this signal is removed, the diagnosis is confirmed. This is risky - you can blow things up if not careful (including yourself). See the section: Bypassing the Startup Circuit for details.

If you hear the high pitched whine of the deflection and/or feel some static on the scree, confirm that the horizontal deflection and high voltage are working by adjusting the SCREEN control (probably on the flyback). If you can get a raster then your problem is probably in the video or chroma circuits, not the deflection or high voltage.
Hope this help

May 30, 2010 | Combination Televisions

1 Answer

Tv smelled like fire and would not turn on


Assuming there are no other symptoms:

If this appears after extended operation - an hour or more - it may
just be a build up of dust, dirt, and grime over the years. After
understanding the safety info, some careful vacuuming inside may help.
Just don't be tempted to turn any screws or adjustments!

Dust is attracted to the high voltage section in particular - even the
front faceplate of the CRT collects a lot and should be wiped with a damp
cloth from time to time.

If the symptoms develop quickly - in a few minutes or less, then there
could still be a dust problem - a power resistor may be heating a wad of
it but other possibilities need to be considered.

If not dust, then probably in the power supply but realize that TVs don't
have a nice metal case labeled 'power supply'. It is just a bunch of stuff
scattered around the main board. Without identifying the part that is
heating, a diagnosis is tough especially if the set really does
work fine otherwise. However, if a series regulator were faulty and putting
out too much voltage, the set could appear to work properly but in fact
have excessive power dissipation in certain components. If cleaning the dust
does not solve the problem, you will probably need a schematic to identify
the correct voltages.
You have to take the television to the manufacturer,

May 29, 2010 | Combination Televisions

2 Answers

Will not read dvd disc

This can be due to dust in the machine, on the disc or surdace damage to the disc.
These are the most common causes anyway.
Clean the disc itself with plain water and wipe with a soft cloth gently to dry it.
Run a CD Cleaner disc in the machine for 30 seconds, and dust off the loading tray/area with a soft brush.
Then try again.

Try other discs to see if the machine is ok - or whether it is the new disc that is faulty.
Smetimes you have to load the disc 3 or more times untill it reads a certain bit of data correctly to start, after this it doesn't seem so important.

Sep 14, 2009 | Polaroid FDM-0700A 7 in. TV/DVD Combo

3 Answers

Have sound but no picture. lcd tv.

If an LCD TV has sound but no picture do the following:

Use the source button to ensure that source is not set to the wrong input.

Try unplugging power cord for ten minutes, to ensure it is not a setting problem.

Check all the video cables at the back of TV.

Check Light /Color settings.

If problem persist and does not depend on external receiver or settings, then it is likely an internal fault.

If it has sound but no picture then one of the following parts is faulty, and must be tested and replaced:

Theinverter is the high voltage board that provides variable power to thebacklight lamp. This is the most common. When inverter is faulty youcan get no picture, or a very dim picture that can only be seen bypointing a torch light with a 45 degree angle on the LCD surface fromvery near distance.
The inverter must be tested by reading voltages with a multimeter.

The LCD ribbon cable/LCD display and connectors.
Thisis quite uncommon, but happens. If the TV had been hit or moved the LCDcable may have slipped out, or the LCD connector may be damaged.

The LCD controller board.
Thisis the board that controls the video signal, it is difficult to test,as there is need to read determined values on IC pins. To test thisboard you need to purchase a service manual and follow thetroubleshooting diagrams on service manual.

Input/Output Signal boards.
This are the boards where youconnect the video and audio cables, if a signal board is defective,then you may get no picture on particular inputs located on faultyboard.

If under warranty contact the manufacturer ringing the number on the user manual.

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from

Encompass Parts Distribution

LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |

Jul 20, 2009 | Combination Televisions

2 Answers

Toshiba MW27F51

There could be a number of reasons for that. The High Voltage (Flyback) could be loose or going bad. only and experienced tech wouls wanna go in there because of the high voltage that needs to be discharged. Or a cracked circuit board or cold solder connection could cause this.

Aug 25, 2008 | Toshiba MW27F51 27 in. TV/VCR/DVD Combo

3 Answers

Under the counter tv

this is a problem of soft is normali becouse is protector of radiation

Aug 01, 2007 | Polaroid FDM-0700A 7 in. TV/DVD Combo

3 Answers

No picture

If the screen is completely black, do you feel static from the screen? If not then you probably lost your High voltage to light up the screen. If you do feel static, and in a darkened room can see a gray screen, then you have lost your video signal internally, and it could be anything from a video IC to the microcontroller chip which would be an expensive repair. Since you see some pixels in the middle of the screen when the TV is off, I'll assume the High voltage is good, and besides the video circuits, it's possible that if you had a defect in the vertical sweep circuits, it might kill the video as well. May want to get an estimate or if it's over 8 years old, replace it.

Dec 19, 2006 | Panasonic PV-DF2704 27 in. TV/VCR/DVD...

1 Answer

Picture problems

you have a vert sweep colapse. Fisrt thing is to get a schematic diagram and find the vert. output Ic and the clamper diode. Measure the voltage on both sides. If its low then its apossibility that the Ic was drawing loads of current and blew out the b+ feed resistor. Look on the schematic and trace back the voltage line from the vert output ic back to the sweep power supply on the secondary of the flyback transformer. check the limiter resistor to the feed and if its open replace the cap right there the resistor as well as the vertical output Ic ALL AT ONCE!!! If you dont you will cause it to go out again in a short time. Good Luck.. If you post the vert part of the schematic I will be more then happy to assist you with this repair.

May 01, 2006 | Symphonic SC3813 13 in. TV/VCR Combo

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