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Screen goes black, but can still be seen with a torch


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#1 cook3017

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Posted 28 April 2014 - 03:02 PM

Hi,

 

Trying to sort a problem with my laptop and hoping someone can help or offer suggestions rather than me trying lots of different things.

 

I have a Acer Aspire 3735Z, and when it is being used the screen will just go black/dark. The laptop is still running and if I shine a light onto the screen I can still see the picture on the screen.

 

If i press the Fn key and F6, which i think is to change the output, the screen will sometimes come back on, but then go back off again, but this does not always solve the problem.

 

Also it does not do it all the time.

 

Could this be a simple loose wire inside or something more problematic

 

Any help would be appreciated

 

Regards



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#2 JohnC_21

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Posted 28 April 2014 - 03:12 PM

Hello, and Welcome

 

Because the problem randomly happens it could be a bad connection. The problem is the backlight or the connection to the backlight, There are two types of blacklights.  A CCFL tube or an LED backlight. If the computer has a CCFL backlight, it could be as simple as replacing the inverter. If not, you would need to replace the LCD screen itself. 

 

This kind of problem is hard to diagnose as it occurs randomly. Your first option would be to remove the bezel of the LCD screen and look for any loose connections. If you are not comfortable with that, it may be better to have a good independent shop look at it.



#3 cook3017

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Posted 28 April 2014 - 03:25 PM

Thanks for the reply,

 

How will i know if it is CCFL or LED backlight? and how difficult is it to replace the inverter, is that located on the screen?



#4 JohnC_21

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Posted 28 April 2014 - 03:49 PM

If you remove the bezel of the LCD screen and see a long thin circuit board with two wires coming out of it, it will be CCFL. If you do not see the circuit board, then you have a LED backlight. From some quick Google searches, it seems your computer has a CCFL bulb and inverter board. I had a CCFL go bad on my laptop and I coverted it to a LED backlight using a converter adapter but when I did this, I could not adjust the screen brightness any longer. The inverter can be seen in this video.

 



#5 cook3017

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Posted 19 May 2014 - 01:53 PM

Hi thanks for the info, replaced the inverter, only took 2 minutes and the screen works perfectly again.



#6 JohnC_21

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Posted 19 May 2014 - 02:02 PM

Glad you got it sorted out. You were lucky that it was the easy fix. Thanks for the update.




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