Flm-3201 I have a Polaroid FLM-3201 LCD TV about 1-1/2 years old and the picture is black. the sound works OK. I HAVE SOUND ON MY TV BUT THE PICTURE IS BLACK,

Check and replace the bad CCFL lamps inside the panel. This is due to backlight problem.

FAULTY POWER SUPPLY OR INVERTER PANEL ON BACK OF SCREEN

AVERAGE REPAIR COST £60 TO £80+

these sets dont have verticale circuits as old sets had
this will most likely require a digital board to correct this problem
or a control box they can run 350.00 and up for the part

You can download service manual here:
http://www.polaroidsupport.com/polaroid/en_us-sm.html
Look for bad capacitors, burnt parts in the power supply first.
http://en.wikipedia.org/wiki/Capacitor_plague

Please post back what you find.

YOU HAVE BAD INVERTOR BOARD OR POWER SUPPLY INSIDE TV CHECK CAP IN POWER SUPPLY MAKE SURE THEY TOPS OF THE CAP NOT LEAKY

May be the Display IC is gone or Problem from the Liquid, I hope that this advise will helpful to you.

its the problem of internal video ic in your tv that has gone faulty so no video only audio you receive.the number of IC is 343ij.this component has to be replaced from the main board of the tv.

this sound like panel or inverters that drive the lamps ( fluorescent lamps that are not replacable they are part of the panel).

If you have no power light at all on the front of your tv. Check the fuse by the power coard.

If you have a red light only and have the dark power board with black heat sinks. check the fuse in the center of the power board.

if the light turns blue when you hit the power button but no picture and have the dark power board replace the 2- 1000 mfd 10 volts caps with 2- 1000 mfd 16 volt caps at 105 deg.

need more help let me know

Hi
There are different possibilities in your case¸but what happened to me ...
The LCD Backligh is out , I mean the bulbs or neons of the screen BACKLIGH, you have to check either the lights itself or the driver circuit which supply the HV to operate it, usually its a separate small long PCB beside the TV main board .
You can try this trick , Keep all lights off in the room and bring a table lamp, preferred a white neon one and face it lighted on the top of the screen with the TV on , try watch a very dark but exact picture with the sound you are hearing. This is a way to be sure that it is LCD backlights problem when using an external light to illuminate the screen .
It worked for me ,Good luck