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An expert who has answered 20 questions.
Re: acer 4520 light going dim
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.
Fn and f8 which is the arrow up button when it is plugged in will brighten the screen, press fn and f7 which is the arrow down button when unplugged to save power or fn and which ever keys have the sun face on it,it kind of looks like a star figure
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Hi there, please perform power drain first. Take out the battery and unplug the power adapter. Press and hold the power button for 30secs. Put the battery back in, plug in the power adapater then turn on the computer. If same issue will occur then you need to replace your battery.
if the unit will power one with ac adapter plugged in then you have a bad battery. check to see if you dc jack on the lap top lights up when you plug in the AC. if it does not light up then your dc jack or ac adapter is bad.
there is a configuration of each one of the three plans of energy, and there you can change the time the screen is on when plugged or unplugged, the brightnes, and some stuff more like the wireless. you have to go to "energy option", or something like that... mine is in spanish. and then under each option is the configuration. good luck!!
It really sounds like you have a short in the ac adapter. Laptops dim the backlight on the screen when on battery power and go full brightness when on AC. I think your adapter is going on and off. When it is on the screen is on full and when it goes off the screen dims down a bit. You could have a bad adapter, most likely, or a bad charging jack in your laptop. Check the adapter first, just use a multimeter set to voltage. Read lead goes to the center pin and black lead goes to the outside metal contact, you should get a reading of 18 to about 26 volts. Move the wire around near the plug that you are holding and keep checking the readout. I think you will find the voltage dropping as you move the wire.
I've seen something like this before, but I can tell you it's not just an Acer trait. It's not often that this happens, but one of the ways you can tell, if you have access to one, is by using a voltmeter to check the voltage of the power adapter tip. The proper reading for most laptop adapters should be around the 19V mark. If you are unsure, take your computer to a local repair shop, describe the symptoms and ask to have the power adapter tested, to see if that's the fault. If the power adapter is reading proper voltages, then chances are good it may be the power coupling or power board inside the laptop, in which case you would have to get it serviced by an authorized service center. If you are currently under warranty either through your place of purchase, or with Acer directly, have them service it, and it should be covered by warranty. If not, repairs can be costly for this kind of issue. Power coupling replacements can usually run you around $250 USD for parts/labour. If it's the power board or motherboard, then costs can jump to $400-500 USD for parts/labour, if not more.