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No keyboard light

On the keyboard i can not see anything when there is no light in the room. i would think that there would be some kind of backlight on it...what can i do to turn the keyboard light on

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  • Goodie Mo Jan 05, 2009

    My keyboard light doesn't work anymore either.

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Can i install ubuntu on toshiba p755d-s5266 but im afraid the backlight keyboard wont light up and the fn key want work with ubuntu 14.04


try with liveUSB, you don't have to install anything to your computer and you can check all features and compatibilities. But on my laptop almost everything worked with backlight and fn keys.

Jul 14, 2014 | Toshiba Tablets & eReaders

1 Answer

My keyboard backlight no working is a dell studio 1735


cielimar61,

To turn on the backlight on the keyboard follow the steps below. The keyboard backlight LED can be accessed through either the Quickset Utility or Windows Mobility Center depending on the installed application.Once this is open click on the Keyboard Backlighting section. Make sure the keyboard light is turned on.

Thank You,
Dell-Jesse L
Dell Social Media and Communities

Mar 26, 2013 | Dell Studio Computers & Internet

1 Answer

Brighten screen


Toughbook is a type of laptop computer marketed by Panasonic Corp.

The durable exterior makes it ideal for use in the military, government, hospitals and EMS systems.

The backlit keyboard is an accessory that can be added for convenience.


Check Power


Check the Toughbook to see if the power is on. Inspect the power cables to ensure they are intact.

View the available battery life on the screen of the Toughbook.


If the Toughbook is not receiving an adequate amount of power, the backlighting may not operate properly.


Optical Sensor


Remove anything that is obstructing the optical sensor.

The optical sensor is on the top right side of the keyboard.


The sensor reacts to light to determine if the backlighting should be turned on or off.

If there is anything obstructing the sensor, the backlighting will not work.


Wipe the sensor with a dry cloth to remove any dirt or dust that may be obstructing the sensor.


Connector Ports


Check the cables in the connection port to ensure the cables are securely inserted in each port. The connector ports that allow the keyboard to communicate with the LCD screen are on the left side of the keyboard and screen.


The keyboard cannot operate properly without solid connections, which are made with a USB and a function cable.


FN Button


Press the "FN" and "F12" buttons to brighten the back light.

The back light may be operating properly but you may be unable to see the light if it is too dim.

Pressing these buttons together will brighten the back light by at least four levels.


Temperature


Place your hand on the bottom of the keyboard. If the keyboard feels hot to the touch, the keyboard probably has entered a protective sleep mode.


The Toughbook will go into protective sleep when internal temperatures reach a dangerous level.


When this happens, allow the computer to remain shut down for a while in order to cool down before it will begin functioning properly.


When the computer feels cool to the touch, it is safe to use.

This typically takes 15 to 20 minutes.


Hope this helps

Nov 14, 2012 | Panasonic Toughbook CF-W8 12.1-Inch Laptop

2 Answers

What is opc light on my sharp aquos tv


This can be called Optical picture control and it adjust to suit the room light.

Please read the text below"

Dynamic Backlight Control - One of the nice features of the Sharp AQUOS LC-32D6U is what Sharp calls OPC, a name they use for their dynamic backlight control. You might also see this feature referred to as a dynamic iris on other LCD HDTVs or disguised under some proprietary name, but fundamentally the principle is the same. Its primary function is to try and maintain a high Full On/Off contrast measures the ratio of the light output of an all white image (full on) and the light output of an all black (full off) image. 2) ANSI contrast is measured with a pattern of 16 alternating black and white rectangles. The average light output from the white rectangles is divided by the average light output of the black rectangles to determine the ANSI contrast ratio. When comparing the contrast ratio of video devices make sure you are comparing the same type of contrast. Full On/Off contrast will always be a larger number than ANSI contrast for the same video device.">contrast ratio under any lighting condition. So when room lights come on or off or the sun enters the room, with OPC enabled, the backlight in the LCD will dim or brighten depending on the amount of light in the room. This is managed by a light sensor located on the front of the unit. When OPC is enabled there can be a slight reduction in the dynamic range of the display as the display attempts to maintain contrast and color saturation as room light changes. We had a chance to compare this feature with another LCD HDTV that was of comparable size but without dynamic backlight control, and the Sharp AQUOS LC-32D6U with OPC enabled was the clear preference.

Jan 24, 2011 | Sharp Televison & Video

1 Answer

Cant see anything on my sony vaio pcg-72dl screen its just blank


Your backlighting may be out.

Try shining a flashlight onto the screen with the lights off in the room.

If you can vaguely see your desktop on the screen, then your backlighting is out.

Let me know if this works,
Simon.

Nov 20, 2008 | Sony VAIO VGN-FE880E/H Notebook

1 Answer

No image on screen


Definitely take it in. Not much room for error inside.

May 30, 2008 | Zenith DVP615 Portable DVD Player

2 Answers

Backlight only comes on when the power button is pushed


It doesn't sound like you're doing anything wrong. It sounds like that is the way the unit was designed. It's a power save feature.

Can you see the time on the screen if the room light is on? If not, the backlight won't do you any good anyway.

Unless there is some sort of menu that allows you to change it, you're probbaly stuck with the way it is. It's all in the software thats programmed into the microprocessor and that's almost impossible to modify.

The only thing I could think of is to find the backlight voltage line and power it directly off of the power supply (using isolation diodes), keeping it on all the time. This however requires you to take the unit apart and dive into the electronics - something you may not wish to do.

- Jim

Feb 12, 2008 | Fisher SLIM-1500 CD Shelf System

1 Answer

Backlight of LCD turns off


Hi,
For latitude systems they have this ambient light sensor. it basically adjusts the brightness of the screen depening on room lighting. try to go to bios by hitting F2 on the dell logo. go to video and try to look for ambient light sensor. however, im not sure if your computer has that feature I have a second option for you though. based on the troubleshooting you've done, it seems that the video back lighting is affected by movement. it would be a good try to reseat the LCD cable. you can use this link to guide you in fixing the computer : http://support.dell.com/support/edocs/systems/latd505/sm/keyboard.htm
all you need to do is to take out the keyboard with 2 screw holding it in place. the LCD cable should then be accessible. it a thick cable that coming out of the Left hinge.

Hope this helps.

thanks.

Dec 24, 2007 | Dell Latitude D505 Notebook

1 Answer

Dell Latitude LCD screen is dark, but computer is still working.


It sounds like the backlight has burned out. The faint light you are seeing is ambient light in your room being reflected through the LCD. Try it in a perfectly dark room and see if you can see anything on the screen. The following page should give you a sense of what is involved in replacing a backlight: http://home.comcast.net/~stonent/screenfix.htm If you aren't comfortable taking things like this apart, I would recommend finding a local repair shop to replace the backlight.

Feb 15, 2007 | Dell E173FP 17" LCD Monitor

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