20 Most Recent Polaroid 3211TLXB 32 in. LCD Television - Page 3 Questions & Answers

Hello; I think this is the same or similar model of my other post. There are 2 capacitors that go bad and when they do they spray out a vapor that looks like smoke! This set uses a very poor design. They are stacking two 450 volt cap to get a 900 volt rating needed in this circuit. This practice was used decades ago, but only with VERY high quality caps that are closely matched ALONG with stabilization resistors to keep the voltage drop even between the 2 caps. Polaroid uses cheap unmatched caps and even WORSE no stabilization resistors. Shame on you Polariod. At least one cap is bad, but they MUST both be replaced with high quality MATCHED caps. There is an 80% chance that these are your problem, but with NO WARANTY. If you have no way of soldering and testing, send it to me with $37 to cover parts, testing caps and return shipping. You must call first 207 998 5687 est. No weekend hours, but OK 9-5 est. Good luck, John

We need to roubleshoot it first.
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: 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 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 rating such as PANASONIC FM or FC series. Please post back what you find.

Hello,

First you need to understand that there is a problem inside the unit that is why you got the flicker and the black screen. Most likely causes are a bad lamp, bad t-com board or a bad capacitor inside the unit.

Either ways, have the television unplugged, assess the main panel for any bad capacitors, if any found, then replace it with a new one, if you do not find any faulty capacitor, then assess the lamp to see if it is faulty, if it is, then you have to replace it, if the lamp does not seem faulty, then you will have to check the t-com board and replace it if it happens to be the faulty component.

To know if a capacitor or a lamp is bad, all you have to look out for is if the capacitor is swollen or looking burnt, and for the lamp all you have to look out for is if it has a leak or is broken or looks burnt.

Take care and good luck

Could be.Try using a dvd or vhs player into the A/V 1 input and then switch the input to same. That will make sure the video circuit is working. When you screw the cable connector on just do it hand tight, to many people use pliers and over tighten the connector then damage the tuner inside the set. Without the cable screwed into the set can you rotate the cable jack? If so, then the tuner needs to be repaired. Not a major job for a tech.

This is a problem on the power board or gate-switch on main board which means a few components need replacing. If you rather just get another power/main board then go here: CLICK
If you are technically proficient and you have test equipment I can show you what to test and find whats causing the problem at my link below.
http://tvtechwork.webs.com/

From the looks of it, you have a bad backlight inverter board. With the tv on, focus a flashlight on the screen from a close distance. Keep changing the channels and see if you notice a faint image. If you do then its a confirmed backlight inverter related issue. Replacement costs about 50-75$ and with little care you can do it yourself as its a relatively easy repair, unless you have never worked on electronics before.

Hi,
Do you get sound in tv whilst there is no picture?
Problem seems with power supply board that is not providing correct/ enough voltage supplies to other circuits in tv so it can work.
If you are familiar with electronics stuff repair and can measure output voltage of power supply with multimeter then check output volts at output connectors, volts rating would be written near these connectors. If voltages are not available then replace power supply board.
If you feel uncomfortable doing so, ask local tv repairman for help.
Hope these info will help you.
Let me know if you have additional question.
Thanks.

Check ur power outlet the power source?Yes,than the tv power supply board is dead.That the power board,that where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Check to see if you get 12vdc at the T-CON board's fuse, it can be no signal from the main board also.
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://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx

read your owner's manual; to find out which video output is HDMI it is usually video3 set this in the video "menu"

use the remote to go to: "menu" then: "audio" under settings choose: external speakers "on"

l;kl

1. Use a D-SUB cable to connect the PC’s D-SUB output jack to the LCD TV’s VGA input jack. Use an audio cable to connect the PC’s audio output jacks to LCD TV’s.
2. Connect all AC power sources, before turning on the power switch of the LCD TV or other connected equipment.
3. Press the button on the remote to turn on the LCD TV.
4. Press the Input button on the remote to select COMPUTER.
   

Let verify first to narrow down to where the problem can be. First, check the on screen sound set up menu to make sure the speakers are not set to OFF. If the setting is OK, then attach the powered PC speakers to the Audio Line out RCA jacks to see if you can get the sound there, if you do, then the problem can be in the power amp circuits, if you do not get the sound at RCA jacks, then the problem can be in the sound processor circuit. Please post back what you find

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com

maybe no connection signal on your tv so it will standby

U check ur incomming power sources with other electronics devices yet,tries other A/C outlet plugs?Tries Websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

You have bad convergence ICs. They are located on the mainboard attached to a large aluminum heat sink. The numbers on them should be of the form STK392-XXX. When you locate them note the number and go to www.encompass.com and order two. One is for horizontal and one is for vertical. Remove the old ICs from the board and install the new ones. Solder wick or a puller is helpful during the removal. Be careful not to get the units too hot. You will need a good gun with a good conical tip. Once the ICs have been replaced and the unit is up and running you will need to set the convergence to align the beams. You should be familiar with this, if not the procedure should be outlined in your operations manual. If this was the only problem your unit should now look fine. While you have it apart you should clean the lenses and the mirror with a soft lint free cloth and window cleaner. Always spray the cloth, never spray inside the TV. If the lines still will not converge you have a bad digital control box. Detailed intructions for removal and replacement of the digital box are located at my tip "How to replace a Projection TV digital control box". Let me know if you need anymore help.

hardrocko

Thanks for using FixYa

Bought a different remote

Sounds like the t.v. has been subjected to a drop or hard impact, usally means that there is a ripped/lose ribbon cable or the vertical channel has been destroyed, you might try unplugging it for a few mins and see if that helps

Take it aparts change the side controller board it dead.The board it dead that why remote control or side controller not working.