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Westinghouse ltv-32w6hd tv i only get power light,, the guy i got it from said the color would sometimes bug out and he had to slap it for it to go back, it got worse over time and now no pic, i only get a blue power light,, i dont see any flicker from back light,, i think its the main video board,, anyone know what components go bad in this tv?

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Almost any device that has to be slapped around has a loose solder connection or a loose connection somewhere inside (could be a loose cable, like the lvds cable) or something similar. In very rare cases, it is something loose inside of a part and you will need to replace parts, but it is probably a solder connection or cable. solder connections are more difficult to fix, especially on the more complex circuit boards. a loose wire is easy to fix, so that would be your starting point. if you feel so inclined, lay the tv down on something soft face down, careful not to put any pressure on the fragile screen. you may have to remove the stand if laying it on the floor, use a blanket, etc...
take all the screws out of the back, some models you have some on the bottom, but most will be going straight in to the back of the tv. pull off the back, and then "reseat" all of the cables.. reseating is just unplug and replugging them to ensure they're all clicked or pushed into place. in some cases, they will be clicked and still need reseating.. make sure you look for locks, clips, etc on the cable ends, and be careful not to break any.
from your symptom, it sounds like it could be the LVDS cable, that goes from the main board(with lots of small circuits, maybe the inputs, etc) to the TCON board (one that drives the screen).. this is the most fragile and also the most likely to be causing this issue. ..

look to see if your tv still has backlight, this is even more likely the cause as you have power, backlight, just no picture.. if you dont have backlight, suspect the power or inverter boards, but still could be main. if reseating cables gets you nowhere.. use an insulated handle of some sort (plastic screwdriver handle (insulated)) to tap on the boards and see if the pic comes back, if you can get it back this way, could be a solder connection..

let me know what you find.. you can look for bad caps also, these are always a red flag - should be flat on the tops
westinghouse ltv-32w6hd tv

i only get - f47466e.jpg

Posted on Jul 30, 2010

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  • Matthew Albert
    Matthew Albert Jul 30, 2010

    I dont see any flicker from the back light,, nothing just the power light,,

    He said the colors would invert and he had to tap it to go back,,

    I got the tv dead just power led,

    I checked for bad caps, i will take it apart more and check for bad conections, i dont see a tcon board on this set,, its part of the main board,, or its hidden,,

    Would a bad conection get this bad?

  • thielectronick
    thielectronick Jul 30, 2010

    Usually a solder connection wouldn't get this bad, but eventually no matter how hard or where you hit it. The TCON has ribbon cables that go straight to the lcd panel. the LVDS cable is like 40 wires or so, and will appear on one of the main board and may run back under the metal (to the screen).. the symptom sounds like power or main board but sometimes anything can lock it up. do you see two colors off the led (like red for standby, then green for on)?

    if you don't get backlight, but do see the led indicate on, then the backlights could be bad or the inverter that powers them. you can take a bright flashlight and look at the screen, sometimes you will see the pic is still there, but no backlight makes it almost impossible to see. try hitting menu to get some words on the screen.

    if the led indicates it ddidnt come on at all, but shows standby power, then maybe the main board isn't telling it to come on, can be stuck buttons, bad main board, or sometimes its the power supply, but some power indicates that board atleast halfway works.. and with no bad caps, its hard to tell without a multi-meter. Let me know and we can figure this out.

  • Matthew Albert
    Matthew Albert Jul 30, 2010

    i get only a blue light when pluged in,, i have to hold the power button down to turn the light off..

    i just took it apart and checked 95% of the conectors,, will check more when i get more time,,

    there is a ATI chip on the main board,, maybe this needs to be reflowed? there is no heatsync on this chip, but the board on shopjimmy has a heatsync, Heating up and colling down over time may weaken the solder,,

    I see this on Compaq laptops with NVIDIA chips alot,,

    i will make sure i get my meter from the shop tomorrow, I have a computer shop, but im kinda new with LCD TV's

    If i was 100% sure it was the main board, i would use a heat gun to reseat the chips just to see... but i would need to be 100% sure,, the main board is $200..

    Also it seems the back light needs a signal from the main board b4 power up.. and the LCD is not showing any images,, i used a flash light at the back of LCD to test

  • thielectronick
    thielectronick Jul 31, 2010

    Try the flashlight on the front of the screen at an angle and look really hard. The inverter (backlight power) does need a signal from the main board, you can check it with a meter its usually labeled like BL_ON or something that indicates backlight on. It also need 24volts DC from the power board. So need the 24 v and like 3.3-5v (hi) on the backlight line. I would wait to reflow any boards until you know its definitely the board. Let me know when you get your meter and what you find, then we can figure it out for sure.



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