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Re: lG laptop computer
Check your power settings. For more info I need to know what OS you are using. Windows XP has settings for both plugged in, and on battery, these settings may also be in your BIOS/Setup. Should just be a setting. If more info is needed, please reply with exact model number, and OS.
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In power settings you will find the dim adjust, Your laptop has power settings you can adjust to your preference. That said, the default settings are usually set to a power saving that means when you unplug your laptop from th AC source your laptop will dim to the power savings settings and prolong battery life. Look in power settings by right clicking the power icon in the taskbar notification area and open the power options. There are many options to choose from I use High Preformance, but on battery it shorten battery life. If you need assistance just respond to this solution.
Ok on your keyboard there should be some way to adjust the brightness just plug in the laptop and adjust it to what you want then unplug the laptop and adjust it to what you want and it should keep that setting. if that does not work you can check the bios settings some laptop bios' have a brightness option.
Normally the way it works is if you plug in your AC Adapter to a laptop the computer screen will Brighten up since its no longer running off of battery and is actually charging . The reason why it should go dim is when you unplug the Ac adapter it goes dim to save battery life and last longer. If you are getting a really dim you can check and make sure that the Ac adapter jack on the adapter or motherboard isnt loose and it could be having contact to the unit and be loose inside and every small movement causes it not to charge / charge in and out and would cause this Dim effect. Again this depends on how old the computer is and I dont really think its the LCD or backlight going bad but you can try to mess with the screen brightness and If im not mistaken on that model it should be the FN key and the Right > and Left < Key for lower and higher brightness. Give that a try and check the adapter connection and you can pin point the issue . Hopefully it doesnt come worst to worst which could be a bad LCD going bad or damaged lcd internal cable. Hope my answer helped guide you closer to a solution.
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.