Burnt IC's located on LCD backlight power supply board.
Where can I get a replacement for this board? Zenith says when they pull up the diagram it does not show a seperate board for this and I know it does because I unscrewed it from the LCD display back housing panel. This board contains the ballast power to power the backlight for the display panel. Please let me know if you know where I can get one.
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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should be troubles hooted. Contact any service technician. The circuit will differ with models and versions.
I am working on a Westpoint TEN-3212 Led Tv. Found the IC on the panel backlight board burnt. Could you please give me the IC number since I cannot seem to find the backlight driver board on sale anywhere.
You can determine if the bulb is bad by simply connect a monitor to the fifteen pin AGP port located at the side of your computer usually color blue. If your computer display the desktop on the monitor,you should change the bulb in your computer display.To change the backlight you need to follow these steps :Power off your Toshiba laptop and make sure the AC adapter is unplugged.
Remove the screws on the side of your laptop screen. Once the screws are removed, you can remove the plastic bezel (screen guard).
Pop the bezel out, exposing all of the LCD screen. Pull the LCD screen gently away from the computer by the corner. Be mindful that the screen is still connected to the computer by a ribbon cable.
Remove the tape over the ribbon cable where it connects to the screen, and gently pull the cable to disconnect it.
Turn the LCD face down, and remove the piece of tape that holds the top metallic foil against the back of the LCD.
Lift the metallic foil to expose the backlight. Remove the single screw at the end of it that holds it in place. Unclip the wire at the end of the backlight from the inverter (power source to the backlight), and remove it from the LCD. Replace it with the new backlight (available at any electronics store or online), and reassemble the device the same way you took it apart.
More likely to be the backlight inverter board, or the main power supply for the inverter board is bad, power supply is easier to get to than the inverter board, so look there first. Look for burnt parts, bad capacitors. http://en.wikipedia.org/wiki/Capacitor_plague
in the lcd tv there are
three main parts 1)the inverter
board(pannel) 2)the main board . 3)the power supply
board. ---------- if there is no power at
all them main board is faulty.if no front led light is
coming ON there is no power .so the main board is not faulty.on the main board there is a fuse located you have to replace that and check first if still no power main board needs to be checked and replaced --------------- if there is sound but no
picture and front led light is blinking then its inverter board panel problem.if
this is your case replace inverter panel.its located in the lower side of the lcd in the inner area below the main board. ----------- but if there is just
front led light blinking , but no picture or sound then its power supply board
problem. ------------ on power supply board
there are some capacitors and ic located.if any of the component gets short
or budged up then it short the power supply board.so you can check
the components on power supply board with multimeter and get it replaced by using
soldering iron. ---------- also you can get new
replaCEment power supply board.this clears the problem completely. --------- you can get the required
board and components at ----- www.partstore.com -------- or from ------
www.radioshack.com ---- --------- if you are not familiar
with doing this you can get it done by local tv repair technician familiar with
this model tv.
Most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board. I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.