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I turned on the ambient light sensor "on" and i do not know how to turn it off. help please.

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Press Fn and A keys (Fn and Q for azerty keyboard)

Posted on Dec 13, 2008

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Dell latitude lcd screen lamp dims


It could be 3 things:

1) Windows settings:
  • Click "Start" and then "Control Panel."
  • Click "Power Options."
  • Click "Choose when to turn of the display" located in the left-hand sidebar of the Control Panel interface.
  • Set "Dim the display" to "Never" for "On battery" and "Plugged in" and then click "Save."
2) Ambient light sensor:
Some latitudes come with an ambient light sensor which automatically changes your brightness depending on ambient light. Toggle it on/off by holding down the Fn key and then pressing the Left arrow key.

3) Brightness turned down.
Latitudes all have adjustable brightness, press the Fn key plus the up/down keys to adjust. Some old latitudes have this setting on the F5/F6 keys instead of up/down. Look for blue icons that looks like lit and unlit suns.

If the above fail, your CCFL (Cold Cathode Florescent Lamp) tube in your screen is possibly going bad. They are $10-$20 on ebay and pretty easy to replace. Just search for "CCFL" on ebay and include the exact latitude model you have. All CCFL tubes use the same power, just the length matters, but people on ebay include model numbers so you can be sure it will be an exact fit with your laptop.

Replacing the CCFL is easy, you will need a phillips screw driver, and possibly a shim/flat-head screw driver, that's it. Just watch a related youtube video by searching for "how to replace ccfl latitude" for a number of good step-by-steps.

Dec 01, 2013 | PC Desktops

1 Answer

Please help me-- My computer is not turning on... Can I fix this?


probably motherboard problem, display adaptor (if you are not using card) .Try press F8 during startup windows. If there is a SAFE mode, reinstall the windows.

Mar 13, 2013 | PC Desktops

1 Answer

When I turn on, the dell logo comes on briefly and disappears. The padlock light is on and the keyboard is "dead" How can I unlock it? Help please


Power down, unplug the keyboard (If it is ps2) and plug it back in. Swap it out with another keyboard if it continues to freeze up.

Apr 13, 2011 | PC Desktops

1 Answer

My Sony VAIO VGC-LV240J/S desktop monitor does not turn on. All the lights turn on but not the screen. The "HDMI" light does not turn off either. Help please. I only had it a few months before...


I encountered this problem with my HP laptop I brought it to the HP repair center because it is under warranty and then they replaced the LCD monitor - it worked, please contact your Hardware IT Technician.

Mar 22, 2011 | Sony VAIO VGC-LV240J/S PC Desktop

1 Answer

When my desktop computer is in standby mode, I move the mouse and I hear everything start up like normal but now the monitor dont turn on and the green light above my " num lock" turn's on. I...


For windows 7 you have to change the power settings and stop it from hibernating.Go to control panel. Go to System And Security. Go to power options / Change when the computer sleeps and change that setting to never. It gets locked in a perpetual loop when it hibernates and locks up..

Feb 18, 2011 | PC Desktops

1 Answer

The monitor suddenly went blank and displayed "no


no signal coming out from the video card input to your monitor. better check if the vga cable is properly fix on the video card and the monitor. you may need also to disconnect the video card from the motherboard and reseat it properly.

just make sure computer is turn off when you do this.

let me know if i can help you further.

Feb 01, 2011 | HP Pavilion a1210n (ED895AA) PC Desktop

1 Answer

When I turn on my PC Windows starts fir 4 seconds then I see on flat monitor LG "Analog Power Saving Mode" and LG monitor goes off (yellow light on monitor panel). Please help.


Windows is severely corrupted and crashes during launch. It's too late to try to fix it, you will have to reinstall it using the recovery disk that came with the pc.

Dec 11, 2010 | PC Desktops

2 Answers

Am using Win XP When I turn the pc on with recovery disk inserted the Press Any Key to boot from cd" screen comes up but pressing any key does not get a response then it continues on to the sign in...


OK! Lets troubleshoot this together.

First thing we want to do is verify that your keyboard & mouse and plugged into the correct places and are powered up and able to work.

Turn your computer on and look at your keyboard and tell me if any lights are on to show that it has power and is operational.

Watch the keyboard lights until the computer gets to the login page and tell me if the lights come on and stay on? Or do the lights turn on for a moment and then turn off again?

If you do not see any lights, please clarify if there are NO LIGHTS on your style of keyboard or if there are lights but they are not lighting up.

If your keyboard has lights and they are not lighting up at all, then turn off the computer and unplug the mouse and keyboard and swap them around. Then turn the computer on again and tell me if the lights come on and the mouse and keyboard become operational.

Once we verify this we can continue to the next step of troubleshooting. Please report what you find and I will help you solve this.

Nov 08, 2010 | IBM NetVista PC Desktop

1 Answer

I turned on my laptop and i get a "system fan error" message that says "turn off system and check your system fan!!"


If you are not a technician, please do not attempt to service yourselves. Take your laptop to the service center.

Aug 06, 2008 | Gateway PC Desktops

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