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Re: TV turns on but the screen has no picture, the menu...
The TCON board Or the LCD panel is Faulty. Can confirm by replacing the TCON board.
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Before you replace the power board, there are a few things you can try to troubleshoot the issue with your Westinghouse WD55UW4620 TV:
Adjust the picture settings: It's possible that the picture settings on your TV have been accidentally adjusted, resulting in a dark picture. Try going into the TV's menu and adjusting the brightness, contrast, and other picture settings to see if that helps.
Check the backlight: The backlight is responsible for illuminating the pixels on your TV screen, and if it's not working properly, it can result in a dark or dim picture. You can check the backlight by shining a flashlight on the screen and seeing if you can make out any images. If you can see images, then the backlight is likely the issue.
Check the cables: Make sure that all the cables connecting your TV to external devices are securely plugged in and not damaged.
If none of these troubleshooting steps work, then it's possible that the power board is the issue. In that case, replacing the power board may fix the problem.
Press the TV menu button. If no menu appears the problem could be a bad tcon display board or backlight inverter board. Turn off the room light and check TV for backlight glow. If it has a glow then the problem can be a loose tcon connection or bad tcon board. Check connections. Or it could be, Possible TV Back-Light Inverter Board Issue: To see if the back-light has gone out, turn the TV on. Turn the lights off and make the room dark. Shine a flashlight onto the screen at different angles. If you can see some of the picture then the back-light has gone out. (It should glow a slight grey if it’s working) To fix this you need a TV backlight inverter board. You can buy one online for a relatively low price. Usually the board will have a few bad capacitors on it. You could attempt to repair it yourself if you can identify which capacitor has gone bad. A capacitor kit for a TV board is ultra cheap. You are best off buying the backlight inverter board and installing it yourself. A back-light inverter board should be from $10 to $25 dollars depending on your TV model
Get free help, tips & support from top experts on jvc tv backlight related issues. ...JVC LT-40SX6AT flat screen. Was watching TV ... ...jvc logo, has sound but nopicture Backlight is defective. I suggest ... Question about LT-42E910 42" LCD TV.
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https://www.youtube.com/watch?v=SXqSg2A5b7I
Jan 6, 2012 - Uploaded by Tampatec
Must See TV FIX EASY COMMON Samsung TV Repair Repairing LNT LCD ... LNT KDL Sanyo ln FLATSCREEN TV REPAIR FLAT SCREEN FIX - Hear Clicking .... i have a JVC LT42E910 WITH a cracked screen. there are all these color .... Vizio LCD Powers on with backlight, Wont power off, No video ...
Sounds like you have a backlight problem. To verify this, turn on the set, dim the lights in the room, and shine a bright flashlight on the screen. If you see a faint picture you have a backlight fault. It could be as simple as a bad capacitor in the power supply, or a faulty inverter board, or in rare cases a bad backlamp.
Tv now turn on,have a flashes of screen backlight,have picture only a few sec. and dies and have audio left only?This problems alway tv are having dead 1 or 2 long LCD inverter boards.These 1 or 2 long LCD inverter boards are dead.These 1 or 2 long LCD inverter boards job are to help the LCD screen panel have a backlight to produced a picture.Tries tv turn on and off a few time,if tv get a stable picture and work,than have a dying tv Tuner signal board,that the board where the incomming broadcasting signal cable plug into it the problems.Instead of those 1 or 2 long LCD inverter baords.Tries websites like Shopjimmy.com,Ebay.com to buy those refurbihes 1 or 2 long LCD inverter boards and also tv Tuner board.
hi all the black screen solution for me was this (this is assuming you have alba brand tvs and have the black screen BUT can still hear the sound) i after much fekkin around with it eventually found the solution in it (its the bloody backlight brightness in the settings you need to turn it from high TO LOW) ....... now this can be a bit tricky because usually when you have the black screen problem if u unplug the tv for a few hours and plug it back in you only get or should get probably like 30-1min of picture time before the picture goes black so u have to be reallllly fast with the menu button to get into settings before the picture dies (i learned the sequence for my alba lcd32880hdf) it was the following (for this part use the remotes arrows the one with the ok button usually in the centre of them) turn the tv on then click menu then press the up key 2 times then press ok then use the right arrow/button twice (although u cant see what ur doing ur navigating the menu hehe) then press the down arrow/button seven times before finally pressing the left arrow/button (once) <-- (now this bit may need to be done twice if you can remember setting ur backlight to max use it twice it will put it on minimum if in doubt only press it the once remember to totally power the tv off before repeating the steps to reset menus default posistions) remember thats the solution i found for my tv stands to reason (since i did infact buy another tv same brand different model which got the same problem) that this could be a solution for all alba tv users try it worked for me 2 times if ur not sure of the menu look up you tv models menu navigation online to find out the buttons you press gl hopefully it works for you too
If the screen backlight is not on, first try adjusting the brightness.
Press TV/AV button on remote to select TV mode.
Press the MENU button on the remote.
Using the arrow keys (navigation buttons), choose picture mode and adjust the brightness and contrast.
If your TV screen is still not lighting up in a dim room, then the backlight is broken.
You have 90 days labor and 1 year parts from date of purchase.
The most likely thing is that your screens backlight or inverter has gone faulty.
When you turn it on, you may be able to see a very very dark image of something (best seen by activating the TV menu). On some screens the picture is still far too dark to be visible though.
With this kind of fault, its down to fitting a new inverter, and if that doesn't cure it, then fitting a new backlight bulb (or bulbs) will sort it out, but these are not jobs that can be done without some expertise at them.
Most TV inverters are large circuit boards inside, and take about 20-30 minutes to change as the whole TV has to be dismantled, but the backlight bulbs are much more complicated (and extremely fragile too).
Unfortunately, there's not much else that can be done except trying changing those 2 parts. Although its possible for the screen cable inside to become disconnected and lose your picture, that results in the screen lighting up brightly (usually pure white if the cable comes off completely).
If the backlight is not turning on, you should be able to see the lcd image by shining a bright flashlight at the screen.
Backlight inverters are loud, so you can hear them operating (high pitched whine) and if the backlight is coming on, you can see white light leaking around the edge of the screen, and even a little inside the cabinet.
Philips are legendary for having power supplies that fail due to bad capacitors, so that could be the culprit as well.
Not really that tough. Sounds as though the backlight is shutting down, either from a power supply failure, or a failure of the backlight circuit itself. You can verify this by holding a flashlight to the screen in the area where the menu usually appears to see if it displayed on the LCD panel with no backlight. If you can faintly see the menu displayed, your backlight has shut down and the most likely cause is the backlight inverter board, followed by the power supply and the backlights themselves which are part of the LCD panel. If you found this information answered your questions, please be sure to rate it. Thanks!
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