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Backlight keeps going out

My backlight goes out sometimes and it usually comes back on after an hour or so, this time it came back on but is gone again within a minute. I don't know what to do???/

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  • stefparks Jul 02, 2009

    could it be the screen inverter?

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Hi
there are possibly two answers to your situation.

  1. the connector which connect the display with the motherboard is not properly connected.
  2. the display module in the motherboard is malfunctioning
in both the cases you must call the customer care.and if your system is under warranty they will repair it for free.

if you find the solution useful plz rate me carefully.

thnx

Posted on Jul 02, 2009

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Posted on Jan 02, 2017

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Picture keeps going out on Philips TV 47PFL3704D/F7, 2009 model. The sound stays on. It happens very randomly-may be fine for several hours, may happen every few minutes. Also happens when playing video...


I think that the connectors from the backlight inverter board that go to the LCD panel's backlight are a bit loose which explains why it comes back on when tapped. I am positive that unplugging and replugging the inverter cables should do the trick. WOuld like to do it yourself? It requires you to open up the tv ofcourse.

Jul 10, 2011 | Philips 47PFL3704D 47 in. LCD TV

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Hi there i have a Bravia # KDL-46VL150 Television


Problem is with the backlight and will get worse over time. Return it if you can. Otherwise, have it repaired by Sony as this unit comes with a 2-year warranty.

Jun 12, 2010 | Televison & Video

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Comes on for second with picture and goes black. turn off and back on will do same thing.


Sounds like it is probably the inverter board. You can find one on eBay, they are usually the problem, not the backlight or screen. Simple change usually and you are good to go. Very inexpensive too, search ebay for inverter board acer P241W, or I have gone to laptopaid.com too.

Dec 17, 2009 | Acer P241W 24 inch Monitor

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I have an HP pavilion f1503 monitor. Every time I turn the monitor on it only stays on for about one or minute then it goes black. I can sort of see the desk top or whatever windows I have pulled up but...


You're right, it is the backlight. Open it up and find the board that controls the backlights (be very careful, there will be high-voltage capacitors even when it's switched off). You can usually tell because a ribbon cable will go from the screen to one board (the display control) and either two or four will go to the other one - the backlight driver board. The two or four cables come from the mini fluorescent tubes that provide the light - one at the top, one at the bottom.
Usually the problem will be a dead capacitor - look for one that looks bulgy, or has been leaking. It could also be a dead fuse, so use a multimeter and find a fuse with no resistance.
If anything is obviously burnt or melty, that's oviously not a good sign either.
It's tough sometimes to work out what component has gone, but they're guaranteed to be cheap to replace - much less than a new monitor.

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Lc32gd8e backlight goes out in middle of a program


This is not a complete solution, but I have found that once the backlight has gone out, I can normally get it back by selecting the "Audio Only" option in the setup menu without turning the set off. This option is really intended for use with radio broadcasts when the picture carries no useful content.
When I press the 'menu' button on the remote and select the right hand most tab, the top option under this tab is 'Audio only'. I select the tab, and then exit from the menu until I need it. When the backlight goes out, I press the following key sequence:
menu, down, ok, right, ok, menu
and the picture reappears. Pressing the menu button opens the menu page at the correct (righthand most) tab. the down highlights the 'audio only' option, and the OK selects this. The right turns the option on (with the backlight working, the picture is removed, but the menu is still displayed). The second OK activates the option. The backlight is turned out. Finally, the second menu key press turns the backlight back on again. This technique has the advantage that the sound continues throughout the sequence, and the recovery of the picture is faster than waiting for the set to boot from a power off condition.
I suspect the problem is caused by an intermittent contact on one of the tubes, possibly as the result of some movement as the tube warms up and expands. (There are 8 tubes in the 32" set.) This causes a safety ciruit to shut down the inverter supplying power to the tubes. Switching off the backlight resets the safety circuit. If I manage to confirm this suspicion, I will write again.

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Back light keeps flickering and sometimes wont work


back light wont need to be replaced most likely, tighten the connections. yes the manufacturer can replace them you could too if u had the skill, money, and time,

Jun 13, 2008 | NEC MobilePro P300 Pocket PC

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Monitor goes off and on


Yes your backlight is going bad! This is common with an LCD monitor! There are no guarantees with these new items! Sorry I hope that this helps! When a backlight goes bad it will generate enough light to display an image, but it will not hold that charge for very long, it varies based on the manufacturer who sells the Montior!

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RE:monitor goes black


Monitor going black after a few seconds can be causd by a faulty power supply or inverter. Some monitors have both as one unit.
Sometimes it is basic failed capacitors, After that then I would look at transistors.
The average monitor from 17 to 20 and sometimes the 22s have usually 4 bulbs in them. One bad bulb will also cause the inverter to not fire up.
Bad bulbs usually show pinkish tint, or flickering or are dark at center top or bottom of the display.
ebays bammbammfran

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