20 Most Recent Polaroid FLM-4034B 40 in. LCD HDTV Questions & Answers

There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both.
Any caps in these sections that look bulged at the top, or bulged/leaking at the bottom need to be replaced.
If you repeatedly turn it off and on, eventually it'll probably stay on, but every time you turn it off, the TV will get harder and harder to start up until one day it just won't.
Sometimes you have to do the opposite to start it up and unplug it for some time and then try again.

If you aren't tech savvy, don't worry, read the rest of this solution and watch the videos.

If you are handy with a soldering iron and can identify the power supply and inverter / FM section for the backlights, an inexpensive handful of capacitors will likely fix you right up.
Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V or 25V or even a 50V, but don't replace a 680uF cap with a 500uF or a 1000uF (unless you are positive it's only doing ripple filtering, and even then, you should go OVER, not under the uF rating).

Most of the caps that go are 10V 1000uF or 3300uF.

I found some great videos of the procedure (for many Samsungs with the same issue) on youtube.

http://www.youtube.com/watch?v=Mm51C_RDIZE
http://www.youtube.com/watch?v=BNHHrgX_6cs&feature=related
http://www.youtube.com/watch?v=8l0AUj8QUkg&NR=1&feature=fvwp
http://www.youtube.com/watch?v=Y7b_nTaZYcU&feature=related

As you can see, this issue spans plasma TVs, as well as large and small LCD TVs and monitors.
The parts are cheap, and skill required is minimal.

Hi Scott,
Replacing the power supply board is not quite technical, no soldering required. But before an attempt to do so, let stand the unit for 1 hour to drain the main filter electrolytic capacitor. Power supply board is where the power cord directly connected. Pull-out all the cables connected from the existing power supply board and then put in the new board, re-insert the connectors and ensure that it is properly seat-in.
Click this link for the replacement or obtain it from your local Polaroid Service Centers.
Hope I helped you.
Thanks for using Fixya.
Jdvillanueva

You can only get what they are sending out. You can't emulate it.

OK, we need to find out if you are losing the backlights or the video signal to the LCD panel.
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board. if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having. If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on: Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r7406380-tv_training_manuals Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps. Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series. Please post back what you find. Please leave rating if it helps.

you can order from shopjimmy.com or discount-merchant.com

Possible errors in the main board , it can be due to failure of a solder joint in the set.
Remove the back panel and switch on the TV to work. when the fault appears then the main boarrd can be tapped lightly to see if there is any switch on of the picture. If so the fault is confirmed and you can continue further. Remove the power connection and solder.

Use these tips below for help:

Check for board faults


Tips on Soldering

if you have volume (audio) then the backlight is not working if you have audio look real close at screen you can see movement if you can power supply is bad or at least the 24 volt section is not working

Revisa este enlace para encontrar la fuente de alimentacion para tu LCD.
Asegurate que la fuente es la misma que tu LCD esta usando antes de ordenarla.

Replace 3-4 bulging capasitors on power supply board. 16volt. 1000mf.

Sounds like the main mother board is the problem. Basically, it's the brains of the TV and it controls everything. The replacement board may cost about in the $200 range. Being that the board is not cheap, best to have a TV tech confirm the diagnoses. Most TV techs come to your home and charge about $50 to look at it.

Replacement Board can be found at a good price at Shopjimmy.com or E-bay.com.

If the capacitors are bad, they will be domed or pushed out instead of flat on the top.

Here's from the Polaroid web site. Remote codes starts on page 47.
http://www.polaroid.com/service/userguides/ce/lcd_tvs/flm_series_ug.pdf

I have fixed many polaroids, the problems is most of the parts are contained in one self contained control box. it sounds like your power board is not funtioning. contact polaroid and let them know about your problem and see if you can get a new control panel. the contol panel only has one connection and 3 screws to replace. hope this helps.

Yes. Take the stand to any hardware store and one of the clerks will help you get exactly the correct screws you need

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