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

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NO PICTURE the set has no video. It does have audio. The screen is completely black and also has no OSD (On Screen Display). Any thoughts or tips...keep in mind..this is an LCD TV...not a regular CRT.

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The dark screen problem with most of these units is due to a failure of the backlight inverter board. It is poorly designed, and sending the unit back to the manufacturer will only get you another unit that will also eventually fail. Also, replacing the bad chip on existing inverter boards will also only result in a short-term fix. I have purchased a number of these units (9) on eBay and replaced the inverter board with a different unit made by a reliable inverter manufacturer. A year later, all of the units are still operating.

Unfortunately, the replacement board does not have the same connectors and pinouts as the original, so it is something that must be done in a shop by an experienced technician. I am hesitant to post the instructions as it is a little tricky and the output of the unit is 900 volts. It would be dangerous for someone unfamiliar with this technology to do it on their own. I will look into the policies of this site and see if I can post my contact information so that owners of these units can send them for repair.

Posted on Dec 15, 2007

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Samsung TSL2793HF - Slight Right Side Pincushion and Horz Line Bottom to Top Until the TV Warms up

Yes, this is rare but I have seen it before--not fixable if it is what I think it is----It is what is called a Dome effect---the shadow mask in the picture tube is actually contracting and or expanding depending on temperature---

Directly behind the phosphor coating (the stripes that you see on the screen) is a metal screen--the holes or perforations in it line up with the stripes on the phosphor screen.

Some masks either have a material or a defect causing the dome effect----Not likely to be anything else---a Pin amp problem will not usually act the way you describe but a shadow mask inside the picture tube will act exactly that way.

Dec 02, 2012 | Combination Televisions

1 Answer

I have sound but no picture. The screen is black

can you see any any menus or the volume bar or channel indicator?
Make sure all your audio and video cables are hooked up correctly to inputs on the TV and to the same set of hookups. For example all of the VCR cables hooked into video 1 and all of the DVD cables in video 2.
Also check that you haven't hooked up the video to the tv's output. Some sets output audio and/or video for external devices such as recording setups or home theater sound systems.

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2 Answers

Polaroid fdm-0700 with black screen display. DVD

go here and order the replacement inverter board. this will fix the backlight issue or no picture issue

Aug 09, 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 |

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1 Answer

Picture off center

This is usually because the resolution is set too low. Right click on the background and go to Properies. Then in the Display Properties Window go to Settings. Increase the resolution.

If you cannot increase the resolution then you need to install/reinstall your video card driver. This should have come with your PC or new graphics card.

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1 Answer

No Picture

check out the tip in my profile or use a wet cleaning tape

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1 Answer

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I think your Video Drum needs to be replaced since it's bad. You can get replacement Video Drums on the Internet.

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1 Answer

Blank Screen.

Wow, thats quite a unique symptom. Usually on the Panasonics, when the screen goes blank it is because the vertical output IC has cracked solder joints, but in that case you will not see the channel numbers displayed on the screen. If you have good audio but see absolutely no picture but you do get channel numbers on the screen then there is a problem in the video circuits. The fact that you say it happens occasionally suggests that a solder joint has cracked loose somewhere in those video circuits and that should be an easy repair that should not cost too much money, so it is fixable and I would not toss the TV yet.

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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.

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1 Answer

Audio/vidio plug in wont show picture on screen, only sound.

There is a broken connection inside the set at the jacks on the set. If you know how to solder and work on solid state circuits, you may be able to repair this,BUT if you dont please take to a repair shop as it should not cost much to repair this. A tV set is not a place to experiment with!

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