I have a Polaroid TDA-03211C that a friend gave to me. He said it needed a new power supply and it should work just fine. I have looked online and someone has apparently replaced the largest capacitor on the PS board and I have no idea what the rating on the original was. I don't think the correct capacitor was installed on the board. All I need is the exact part number or the exact rating for the original capacitor for it. I do have a picture of my board if anyone would like to see it (not sure where to upload it though).

what were you cap values on the power supply thet you replaced?

Yes and no, you need to do more troubleshooting to see if you are getting all the DC voltages.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or PANASONIC FM/FC series Low ESR, 105c, High ripple current and long life rating made for switching power supply from Digikey.com
Parts: www.shopjimmy.com

Please post back what you find.

You can replace the eltrolytics caps on the power supply, or buy a new one at www.partstore.com

you have one or two bad capacitors in the power supply tha can shaped device will have a domed or puffed top where it vented the value is written on the side have someone replace them and you will be good to go

How is the power supply module? Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

it is an east fix but not a backlight issue, it is
one or 2 bad capacitors in the power supply
easy to find they will be puffed up in the tops

Do you have any power supply boards left for a TDA03211C?

I have a 3 year old TV with the same problem as shema_ross.

Repaired dead Polaroid TDA-03211C

I fixed a dead Polaroid TDA-03211C for my friends. When it failed it had just been turned on and then it went totally dead. This unit is a little over a year old and out of warranty. When I inspected the power supply it was continuously trying to start up but could not. With a Fluke meter you could see some of the DC output voltages rapidly rising and falling, but never getting to normal levels. I pulled the power supply thinking some of the capacitors were bad. Once I had the power supply out I used the Ohmmeter to check for any open or shorted diodes and/or transistors. To my surprise I found a shorted diode! I figured it would be the capacitors (typical failure in switchers), however they looked OK (not leaking goo or puffed out) and the TV is not that old. The failed diode (sorry I forgot to get the circuit designation) is a HER-304 (near the middle of the board with the cathode lead soldered to a small silver colored heatsink). The HER-304 is a 300 Volt, 3.0 Amp High Efficiency Rectifier in a DO-27 package. The DO-27 package is cylinder shaped with axial leads, 0.375" (9.5mm) long and 0.197" (5mm) in diameter. This diode is for the 20 volt source and is connected to one of the secondaries of the transformer. On eBay I found a vendor selling five (5) HER-305 (400 Volt units, better than the original) for $1.25 plus $7.95 shipping. Also I checked most of the Capacitors with a Sencor Z-meter, all that were check were OK. If a Cap. had another in parallel with it I did not check the other. I removed (un-soldered) the heatsink from the board and then the diode from the heatsink. I put it all back together and Yes, under $10.00 in parts (actually a $0.25 part) and a little time and the TV works again! 24 July 2009.

WARNING!!! WARNING!!! WARNING!!! Switch mode power supplies such as this use and generate voltages at current levels that can be LETHAL!!! If you DO NOT know what you are doing, find someone that does or buy a new TV, it is not worth dying for!!!

sounds like inverter board. What it sounds like is happing is your LCD is working ut the backligkt board that allows you to see is kicking off. (as you still have sound) Which could be the (most likely) inverter board, or the power supply board. You can take apart and check for voltage at your power supply. The power supply has a pigtail with large white wires and a connector. Power up with the center back cover off and check your voltage at the white connector on the power supply before and after the screen gos out. If there is no large voltage loss it is your inverter board.

You can used boards on e-bay or
www.rns-systems.com