Question about Acer Aspire 4720 Notebook

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I want to increase backlight but f5 is not working

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Press function key and keeep pressing your right and left arrow below enter keys , you will feel the difference.


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Pinak dey

Posted on Nov 12, 2010

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Hi, I have a problem with Aspire 5570z The problem with 5570z is this: my Screen is blank with power and sound is on.


Unless the backlight has gone bad, try Fn+F5 and Fn+F6 keys to see if your display returns. Fn+F5 toggles to an external screen; Fn+F6 toggles the backlight on and off.

Aug 23, 2014 | Computers & Internet

1 Answer

Fn+f4 and fn+f5 are not working on Fujitsu Amilo PI 3560


Go to the Fujitsu suport Web site and install a file called FJ Launch Manager Utility. After that it should work fine. Although this is not my computer so I have not tried it myself. Hope it helps.

Mar 21, 2014 | Acer Aspire One Netbook 8.9" Notebook

1 Answer

Monitor is dark. how to fix?


Walt, hold the Fn key down again, and tap once more on the Acer, F5, Display Toggle-Over key.

There are at least 3 display options available;

1) Internal display of laptop ONLY

2) Internal display of laptop AND external display

3) External display ONLY.

Were you just using the external display for more 'display real estate room', or was/is there a problem with the internal display of the laptop?

Was no problem? Is now? Even when using the guidance stated above for the Fn and F5 key?

Then if your laptop uses a CCFL for a Backlight, it also uses a screen Inverter. Screen Inverter is bad.

If it doesn't use CCFL/s for a backlight, and uses LED backlighting, replace the LCD screen.
The LED backlighting is incorporated in the LCD screen assembly, and you ain't replacing it.
Replace the entire LCD screen.

Post the laptop manufacturer name, and model number in a Comment. Model number is on Bottom of laptop.


Try to hurry as I'm going to a meeting with the head of General Motors, (Obama), and later with Bill Gates.





OH I'M JUST KIDDING!



Regards,
joecoolvette

Nov 14, 2012 | Computers & Internet

1 Answer

Lost its brightness and clarity


Hello
Check whether the backlights get full brightness as you increase the bright ness level. Set the set to least contrast level, and check whether the backlight is sorking well. If it is OK, then try to increase the contrast level [to at least 70% of the total]. If backlight level cannot be adjusted according to the contrast level the backlight inverter baord and backlight CCFL lamps need to be checked.
images of the backlight inverter board and CCFL lamps are attached here.
2_21_2012_2_11_16_pm.jpg2_21_2012_2_11_46_pm.jpg2_21_2012_2_11_57_pm.jpg

Feb 21, 2012 | Toshiba 42HP66 42 in. LCD Television

1 Answer

No display


The following applies to Acer Laptops...

If the power indicator is lit but nothing appears on the screen - The computer's power management system automatically blanks the screen to save power. Press any key to turn the display on.
If pressing any key does not turn the display back on, check the following....
1. The brightness level might be too low. Press Fn and the right cursor key to increase brightness level
2. Display device might be set to an external monitor. Press Fn and F5 to toggle to the internal display
3. Backlight might be turned off. Press Fn and F6 to turn on the backlight.
4. If the Sleep indicator is lit, the computer is in Sleep mode. Press & release power button to resume.

May 09, 2011 | Acer Aspire One PC Notebook

2 Answers

Power is on but no signal output to the screen


The following applies to Acer Laptops. You did not specify the brand of laptop you had. If your laptop is not Acer, the specific keys mentioned may be different and you should adjust accordingly.

If the power indicator is lit but nothing appears on the screen - The computer's power management system automatically blanks the screen to save power. Press any key to turn the display on.
If pressing any key does not turn the display back on, check the following....
1. The brightness level might be too low. Press Fn and the right cursor key to increase brightness level
2. Display device might be set to an external monitor. Press Fn and F5 to toggle to the internal display
3. Backlight might be turned off. Press Fn and F6 to turn on the backlight.
4. If the Sleep indicator is lit, the computer is in Sleep mode. Press & release power button to resume.

Apr 04, 2011 | Computers & Internet

1 Answer

Toshiba Equium A300D - 13X laptop black screen.


Hi. try accessing the Start-up BIOS features by pressing F2 or Delete key when you see the Toshiba logo. Check for the Tab that will give you the control for the brightness/contrast of the screen. If that doesn't do anything then most probably the backlight (LED or CFL) must have been busted. and needs replacement.

^_^

May 06, 2010 | Computers & Internet

2 Answers

Black screen on acer 242lc lights come on power up


You may have a 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 LCD Parts for service, parts, and DIY info Use this link to their WEB site :-
www.lcdparts.net

Sep 18, 2009 | Acer TravelMate 242LC Notebook

1 Answer

Dishwasher Error code/


F5 according to the manual suggests you have an 'increase in temperature when element should be off" The possible cause : Faulty element, Faulty elecronics controller or faulty temp sensor.. In all cases they suggset you have your service reapir person resolve...
Hope this helps..

Sep 21, 2008 | Dishwashers

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