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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  • wilma kitimiki Jul 26, 2006

    that contact number said it wasn't available in my area. got another number?

  • Anonymous Feb 07, 2008

    same as above, there is no back light and it is not very old

  • salamee Mar 12, 2008

    I have sound no picture.

  • ITBVWRacer Dec 07, 2008

    same problem...back light is out and only a yr old....what gives?

  • Anonymous Dec 08, 2008

    tv dose not work ,plays dvd no picture 

  • jacusimano Dec 08, 2008

    Same problem



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

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Try this site

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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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LG TV SVC Code 39LN5300-UB.AUSDLJM would not turn on, there was no stand by light. I replaced the power supply and now I do have audio, no back light and the picture is only visible using a flashlight


It is either the backlight or the LED driver board. To confirm, please check the LED drive voltage from LED driver board. If the drive voltage is available, it is the LEDs in backlight causing the problem. More often it is the bad LEDs in the backlight array.

Good Luck.

Feb 17, 2018 | LG Televison & Video

1 Answer

Cant get menu up to go to scan air channels it either shuts itself off or flashes the screen with no time to hit the up/down channel button to get to the air screen any ideas?

1. Check out is the backlight on when you power up the TV?
2. If the backlights is on, then turned off when you power up the TV, please check the backlights power supply voltage (usually is 12V, or 24V), backlights ON voltage should be 3.0 V or higher, the DIM control voltage should be 2.8 V or higher.
If the 12V (or24V) voltages is missed after shuts down, you do have a power supply problem;
If one of the control voltage is missed or low, you do have a defective main board.
3. If both of the control voltage are high, the backlights turned on and then turned off, you my have a defective backlights inverter board, or defective lamps inside the panel.

Good luck to find the problem.

May 01, 2015 | Sanyo DP46849 46 in. HDTV

1 Answer

I have an RCA model D52W23 tv and the colors are out of line

Do not use magnet on or near this set---

This set is known for convergence problems where picture looks 3 d etc and this is caused by bad connections under and around the high voltage transformer in many cases.

First thing to do is look in menu to see if "Convergence" option is still there or missing----three small parts available as a kit exist to correct that if the option is missing (all are at same place around the high voltage transformer).

Set would have to be taken apart if you are able to check things there---if not most techs familiar with this set can deal with this in the home.

the connections and parts are all right where the high voltage transformer (called a flyback) is located.

typical flyback:


Dec 03, 2012 | Televison & Video

1 Answer

Toshiba 50A61 have sound but no picture - all fuses check okay

Not too many--if sound is developed from the set and not a surround system the set will blank the 3 picture tubes for a few reasons:

Voltages missing at the tubes (high voltage or screen voltages etc)

There is a loss of vertical sweep or horizontal sweep--set will do here this to prevent an INSTANT burn mark on all 3 tubes.

One thing you can try to look for is to see if the filament in each tube is lit---rather dim as 6.3 volt one---if lit the above reasons are your problem.

Without a meter, a schematic etc not much more you can check.

You should hear a faint whoosh sound when you power the set on--the high voltage coming up.

Jun 07, 2012 | Toshiba 50A61 50" Rear Projection...

1 Answer

I have a LP156WH2 LG display from an acer notebook and i can see the image but the led backlight does not turn on, it had a led open i replaced it for an identical one and still is not turning on, i live...

Check the supply voltage to the backlight LED's. If it's too high and thus causing the LED's to go open a new panel will just become junk when powered on, and you may have damaged the replacement panel you already tried. To check the voltage just measure it at the cable end you connect to the panel. If no voltage bad motherboard. If too high still a motherboard issue, but you might be able to regulate it with a simple solid state voltage regulator.

Jun 08, 2017 | LG PHILIPS LP156WH2(TP)(B1) COMPATIBLE...

1 Answer

I have a 1 yr old samsung flat tv that has a sound but no can i fix it. i am in an isolated island here in basco, batanes philippines with no experts in repairing flat tv.pls advice. tnx

Kung LCD TV ang unit mo, 3 ang dahilan kung kaya la kang picture.
1. Me pundido kang backlight - kapag me pundido kang backlight kusang pinapatay ng power supply ang inverter board para hindi ma-overload kaya la kang picture. Maaring mong i-check ang backlight, ang palatandaan na ito ay pundido ay kapag me itim sa magkabilang dulo.
2. Sira ang inverter board - ang inverter board ang nagbibigay ng high voltage sa backlight. Kapag sira ito, natural d gagana ang backlight. karamihang sira ng backlight ay ang high voltage transformer, driver transistor o kaya me open na fuse/fusible resistor.
3. Power supply- kapag la supply voltage sa inverter board, la ka rin picture. Mas maganda kung ito ang sira dahil mas madali makhanap ng pyesa dyan sa lugar mo di katulad ng 2 nauna.
Kung me kakilala kang technician dyan malapit sa lugar nyo, patingnan mo yong mga sinabi ko. Maari ring dahil sa loose connection kaya la ka picture o kaya bad solder joints.
Salamat kapatid sa pagboto 4 na hinlalaki.
Las Pinas NCR.

May 21, 2011 | Samsung Televison & Video

2 Answers

No light or picture. only sound and the screen is dark.

Two probable points; either the loss of the service voltage for the high voltage section or a failure in that section.
The circuit that produces the high voltage for electron beam acceleration also produces the sweep for the horizontal movement of the beam, in other words, if this circuit fails or the voltage it needs to operate is gone, no picture, but the audio still functions.
Because of its Chinese origins, there is a chance that critical specialized parts may still be available for it or, if you are lucky to have a tech competent to repair standard TVs, he may find a less critical part that has failed and readily available.

Dec 01, 2010 | Haier TN201AUV 20" TV

1 Answer

I have a Polaroid 42" TLX-04244B. When turning the power on the polaroid logo comes on for a sec. then screen goes black with the blue power LED staying solid. Im pretty sure the power suply board isnt...

The Inverter is trying to produce the high voltage to light the backlight. It looks like it cannot hold the charge to maintain the high voltage level in order for it to stay on - you get a momentary display at initial power-up thus see the logo. Replace the Inverter board.

Sep 08, 2010 | Polaroid Televison & Video

1 Answer

My laptop screen is bright. Brightness control works but no picture. The picture is ok on external monitor. Sometimes a faint and incomplete picture appears on startup but disappears after a few seconds....

This might be a sign of a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Aug 25, 2010 | Compaq Presario 700 470024-192 Notebook

1 Answer

GE Model #25GT511 Power on, no picture or sound

The question I have is if the tv stays on but with no pix or sound,we have a way to check,if you place your forearm in the face of the picture tube and the hair in your arm stands up it means you have the high voltage needed to light up the tube but something else is missing like the screen voltage or it has a loose conection in the crt board,if the hair in your arm does not react to static then we are missing the high voltage and the problem might be more involved and related to the horizontal circuit not creating the high voltage needed.If you are familiar with tv service you have a few places to check but if you are not to familiar play it safe and call for assistance from a professional servicer.Let Us know how it goes please.

Oct 25, 2006 | GE 25GT511 25" TV

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