Try looking for a function key (usually used by holding down the Fn key and then pressing one of the "F" key at the top) the key will be marked with a brightness indicator.
Is your screen only dim when running off the battery is it dim when running when the charger is plugged in as well. If it is only dim when the laptop is running on battery then this may be caused by a setting in Power Options which is located in Control Panel (that is if your running Windows). In Power Options look for settings about running on AC Power and running on Battery power.
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The screen may be too dim to read. Sometimes when the batteries are low, the screen automatically dims itself. The problem is, it doesn't undo that when the batteries are replaced. Try pressing 2ND->Up arrow key repeatedly while the calculator is turned on and the screen should start to darken so that you can read it.
Well, first you will have to check your options, if you can read it enough to get in there. You may have the backlight turned off. If the backlight is not turned off, then you probably have a bad backlight and will have to take it to your provider to get it fixed. Replacing a screen/backlight is not something I would attempt to do unless you are certain you know exactly what you are doing as you can render the phone completely useless.
Try using the brightness controls on your keyboard to brighten the screen. If that doesn't work then that means either the lcd or the inverter has gone bad.
You could have a bad "inverter" or flourescent backlight tube, or a problem in your power supply.The only way to isolate the problem is to check each component in sequence.If your hard disk and DVD / CD drive are still working when your screen goes dark, then I'd say it's the "inverter". You'll have to take it to a repair shop.
Yes I did. You will need to get a service manual for this TV set to trace the voltage coming from the sweep power supply. If this is a problem that is new after you replaced the convergenbce4 board, you for sure have a broken wire or connection somewhere in the set. Have seen this happen may many times after a novice repairs a TV set. Good Luck
dell inspiron 8500 screen is dim
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