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Aspire 5520 has LCD Display. The
screen displays becomes dark/ dim if there is no backlight. There
are two parts responsible for lighting the display. First is the CCFL
(Cold Cathode Florecent Lamp), which is the back light and the second
is the Inverter board, which provides high voltage to the CCFL. These parts are inside the LCD screen. Either
of the parts may be faulty or in some rare cases both. Also, the video data cable may be loose or faulty, which can be identified only after opening the top cover. So,
my advice is that you get it properly checked by any professional for
replacement of Inverter or CCFL.
Hope it helps! Good Luck! Thanks for using Fixya! CreativeTECH
I am assuming that you have tried switching from external monitor output and local monitor. There should be a hot key on the keyboard to switch it. Also, try looking to make sure the driver for the display is up to date. I f it was update recently try rolling the driver back. If you need help with doing any of this post a comment. Hope this has helped some.
Hi No otto,
On the bottom row of keys, you will see one marked Fn, in a different color. Hodl that and look at your top row of keys. Should be one with a laptop screen, and a monitor. The little graphics will be the same color as the Fn key. Tap that once, wait, see if the screen comes to life. Usually that key is set to choose "Just laptop screen, just external monitor, or both", with each tap.