Question about Olevia LT42HVi 42 in. LCD Television

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Screen goes dim on one side then the other, sometimes works fine

At times, all is well, then 1/2 screen will dim, then chang later to other side, sometimes all black. Very frustrating

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I suspect the invertor for the backlight lamps.  If the failure mode is one that is all too common today, there are some cheap parts (electrolytic capacitors) that should have cost a few pennies more. This is probably not in the category of DIY repairs but you may be able to locate and replace the power supply board or boards yourself since everything is plugged together if you can find someone to repair them or has them in stock. 

Posted on Nov 28, 2008

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6ya6ya
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Posted on Jan 02, 2017

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I got samsung laptop R580, the screen broke because of falling so i ordered online, and replaced it with new one myself, it was working fine for two weeks but after two weeks the screen went very dim! I...


The inverter could be faulty. The inverter supplies high voltage to the CCFL lamp that provides the back light. The inverter is located at the bottom of the LCD screen between the hinges.

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My brightness control does not work just turned on and can not hardly see anything it is up and running what now


Have you tested it with an external monitor?

I would say you either have a damaged inverter board or screen baclight lamp. Usually the inverter board fails in one of the following ways:

1. When you turn on the laptop, the screen lights up for a short period of time and then goes dark. You still can see an image but it is very dark, almost invisible and definitely not usable. When you restart the laptop, the screen lights up and then goes dark again. The laptop works fine with an external monitor.
2. Your laptop turns on but the screen remains dark all the time. You still can see a very dim image outline. The laptop works fine with an external monitor.
3. The laptop screen works fine for hours or even days, but sometimes it goes very dark as it mentioned above. When you restart the laptop, the screen works fine again.

Inverter failure symptoms are very similar to backlight lamp failure symptoms and in most cases you cannot tell which one is causing the problem until you replace either the inverter board or the backlight lamp. From my personal experience, inverter boards fail more often than backlight lamps. If you have to guess, replace the inverter first.

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VERY Dim screen after a drop


Have you tested it with an external monitor?

I would say you either have a damaged inverter board or screen baclight lamp. Usually the inverter board fails in one of the following ways:

1. When you turn on the laptop, the screen lights up for a short period of time and then goes dark. You still can see an image but it is very dark, almost invisible and definitely not usable. When you restart the laptop, the screen lights up and then goes dark again. The laptop works fine with an external monitor.
2. Your laptop turns on but the screen remains dark all the time. You still can see a very dim image outline. The laptop works fine with an external monitor.
3. The laptop screen works fine for hours or even days, but sometimes it goes very dark as it mentioned above. When you restart the laptop, the screen works fine again.

Inverter failure symptoms are very similar to backlight lamp failure symptoms and in most cases you cannot tell which one is causing the problem until you replace either the inverter board or the backlight lamp. From my personal experience, inverter boards fail more often than backlight lamps. If you have to guess, replace the inverter first.

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1 Answer

Dell ADAMO 13 w/Vista 64 Random power failure...goes dead in 1 second. Battery fully charged. Happened with external power and when on battery. I have latest BIOS v6.0. I ran pre-boot diagnostics...


If the power totally fails (i.e. power is cut off, LEDs turn off, fans stop, ... etc), then this more likely to be because of a short circuit developing in a failing semiconductor component, or a power supply problem.
However, if the laptop is still running & only the display on its LCD is cut off but the laptop itself stays powered on, then your laptop might be experiencing a failing screen inverter board, a failing screen backlight lamp, or a failing LCD screen cable.

TYPICAL INVERTER FAILURE SYMPTOMS

1. When you turn on the laptop, the screen lights up for a short period of time and then goes dark. You still can see an image but it is very dark, almost invisible and definitely not usable. When you restart the laptop, the screen lights up and then goes dark again. The laptop works fine with an external monitor.
2. Your laptop turns on but the screen remains dark all the time. You still can see a very dim image outline. The laptop works fine with an external monitor.
3. The laptop screen works fine for hours or even days, but sometimes it goes very dark as it mentioned above. When you restart the laptop, the screen works fine again.

Inverter failure symptoms are very similar to backlight lamp failure symptoms and in most cases you cannot tell which one is causing the problem until you replace either the inverter board or the backlight lamp. From my personal experience, inverter boards fail more often than backlight lamps. If you have to guess, replace the inverter first.

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SIR-PNP3


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ThankYou for using FixYa. Have a nive day.

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4 Answers

Screen is white but music still plays


I have the same problem .. But i found a trick ...When you have a blank screen.
1 you must listen music else press play until you listen it
2. flip the switch on the side to lock position
3. press on buttom the next tune 1-2 seconds
4. you will have a black screen ( you listen the music again)
5. flip the switch on the side to normal position.
6 the screen appear ok now..

7. else repeat ( most time once is ok but sometimes 2 or 3 times)

connex_bern

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sounds like the LCD background light is either loose or going bad

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