When the case is closed the front cover display light go off resulting in quick battery drain. This is on both my daughters and mine. We previously had external covers on and that might have created the problem although it appears to shut correctly.
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1.Check your monitor brightness setting. Occasionally, the monitor brightness can get accidentally turned all the way down. This will result in a completely dark laptop screen that appears to lack a backlight. Adjust the monitor brightness via the dedicated brightness keys at the very top of your laptop's keyboard.
2.Toggle the backlight back on via the keyboard. This is accomplished by using the "Function" key, which lies near the bottom left of your laptop keyboard and is marked "Fn." When pressed in conjunction with one of the "Fx" keys on the top row of your keyboard, you can toggle the backlight on and off automatically. There is an "F1" key, an "F2", and so on. The exact key to press simultaneously with your "Fn" key will vary by laptop model, so consult your computer's user manual. You may have accidentally toggled the backlight off and simply need to toggle it back on via this key function.
3.Prepare to operate on your laptop if you cannot toggle the backlight back on. Shut down the laptop. Disconnect the AC adapter cord from the back of the computer, then close the display and turn over the computer.
4.Remove the battery. The battery on most computers is at the top of the laptop's underside, although some computers may feature the battery in a bottom corner. The horizontal outline of the battery will be clearly visible all the same. Beside or just beneath the battery will be a battery-release latch. Slide this to disengage the battery.
5.Turn the laptop back over. Open the display.
6.Observe the bezel, which is the perimeter that runs around the display. There will be a number of rubber caps that exist on the bezel. The exact number will vary by laptop model. Use the tip of a flat-head screwdriver to pry under the caps and pop them off.
7.Remove the screws under the laptop bezel's caps with your Phillips screwdriver.
8.Work around the bezel's perimeter with your fingers and pry the bezel completely off.
9.Look at the bottom of the monitor assembly. A thin inverter board will span horizontally across the screen's bottom. There is a connector on either end of the inverter board. If the right cable is loose from the right connector, lift up on the connector and slide the cable back in. This will restore the laptop's backlight.
10.Replace the bezel and the bezel's screws. Reinsert the battery and power on the laptop.
The problem is cause due to one of the following: the backlight or the display, check your monitor brightness settings. Sometimes your brightness may accidentally have been all the way turned down, resulting in a blank/dark screen. The monitor controls are on the keyboard, directly above the numeric keys. Look closely at your laptop's screen if the steps do not restore power to it and if it remains blank. Can you see a faint image on the screen? If so, the backlight may be off due to the LCD "lid close" detector malfunctioning. This malfunction likely happened due to the lid close switch being stuck in the "closed" position even though the lid is open. The switch is located beside the LCD's screen hinges, and tapping the switch a few times should unstick it. Use an S-Video cable and plug your laptop up to an external monitor, such as your television set. With the laptop and TV hooked up, turn both on and see if your computer's desktop is displayed on the TV. You can also use a fifteen ( 15 )pin monitor desktop monitor by connecting it to the blue fifteen ( 15 ) connector at the side of the laptop if you cannot see anything on screen it is the display problem. If it is, your laptop's display needs to be replaced. If not, your motherboard and/or video subsystem may need to be completely removed and replaced.
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 www.lcdparts.net
Your have a "Display" button that toggles thru different display modes .. one of the modes turns off the LCD backlight .. that useful if you are in bright light and dont need the backlight .. you have a very nice "transflective" display that works great in bright light without the backlight ... you can get more shots with the backlight turned off on each battery charge .(about 25% more) .
so each time you operate the display mode button you will get a different display .. one shows a hystogram .. one turns off the backlight and one puts the camera in a normal mode ..
if everything is working right then even with the backlight turned off you should be able to go outside or any brightly lighted area and see the picture on the screen ..
sounds like your backlight brightness is turned all the way down. this happens automaticlly on my windows 5 mobile device when the battery is almost dead and when i recharge it it stays this way. if you take and turn it from side to side you can see a faint outline of the windows under a bright light go start settings and adjust the backlight brightness up this should resolve your problem