Question about Acer Aspire 5720-6661 Notebook PC

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My screen keeps on going dark and I have to press Fn and F6 to get it back. Any ideas?

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  • Acer Master
  • 32,281 Answers

The fault could be a faulty CCFL lamp or inverter.
To determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
for parts, repair service and DIY info.

Posted on Jul 24, 2009

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1 Answer

Acer laptop screen is dark an will not brighton l


I would like you to try 2 things:

1. Press and hold the blue Fn key then press the right arrow key a few times and see if it gets brighter. If that doesn't work try #2

2. Press and hold the blue FN key then press F5 or F6 not sure which one changes your screen. If it seems to mess something up it's ok. Just press the same combo that messed it up once or twice and it will go back to normal.

Please comment and let me know if it worked! :)

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Locate the Fn (Function) key on your keyboard. It may be on the bottom left side with dark blue letters. Locate the two "brightness" keys near the top of the keyboard. These will be in the "F" keys, possibly if F6 and F7. They should have little sun pictures or something similar to indicate brightness. Hold down the Fn key while pressing F7, or whichever "F" key your laptop uses to increase brightness. Tap F7 repeatedly until you reach the desired brightness. Fn must be held down as you continue to tap. Hope this helps.

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If your laptop appears to boot up and the hard disk LEDflashes, then the problem is probably a back light fault. This can be a faultyinverter or a faulty CCFL lamp. Please click on this link and follow myinstructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

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Hi

Have you tried pressing the fn+f7 keys this should brighten the screen
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hope this was helpful

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Change the settings from the display settings panel. (Right click on the desktop and go to display settings)
You should see 2 monitors graphically represented there. 
You can make the monitor that is greyed out active by right clicking on the monitor, and selecting active.


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My FN+F6 doesnt keep my screen on the laptop open


Hi,
I think you're trying to output the screen to external monitor right ? So when you press Fn+F6 this will output to external monitor only but if you do it again it will output to both (External and you LCD) and if you repeat the step again you're back to normal.
goodluck,takecare.

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