I have a polaroid TLX03210b Tv and the screen is black and no sound when the blue light is on. after it has been on for a few seconds the red light inside on the board starts to blink. if I shine a flash light on the screen when I first turm the set on I can see the Word Polaroid come up on the screen for just a second. but the screen is very dark.
The only way to know is guess and install a replacement board or boards if you can even find them--this is the nature of these types of sets and oh Yes, it does not have to be a board as a display panel is not impossible.
SOURCE: sound but no picture polaroid tlx03210b
Take a flash light and point it close to the screen . do you see a picture.
You have a bad back light or inverter the powers the back light. in any rate here the unit will need a repair shop because these are hard to get to you have to dig.
let me know ether way/
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SOURCE: Polaroid Mdl# TLXO4240B LED blinks red and blue,
Disconnect the jack lead that goes to the inverter board and see if you have 24v from the P/S. If you don't then you should replace the power supply. If you have 24v, then the inverter board is bad.
SOURCE: Polaroid TLX-01511C screen goes dark after power on
If the screen is still glowing, then you may have either dead T-CON board or the main board. Dead backlight inverter board will not get any glow on the front or the back of 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 are some troubleshoot 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://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
Please post back what you find.
SOURCE: I have a Polaroid 42" TLX-04244B. When turning the
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.
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