Hello Acer team,
I bought Acer Aspire 5740G laptop in June 2010.
I have installed on it Windows 7 Ultimate x64.
My first problem, is about "fn" buttons + left/right arrows doesn't work. fn + up/down buttons works perfect (volume changer). Same works with all other fn key commands such like fn + F8 to mute/unmute etc. The only doesn't work is for brightness. I have all drivers up to date, windows latest update, also my Graphic card is latest version. I also tried to roll-back to a older version of some drivers in hope that my problem will be fixed. Nothing.
Anyway, I found a strange "trick" to change the brightness of the monitor, If I want to increase or reduce the brightness, I have first to press these combinations: fn + F6. This one will "close my monitor, then when the monitor is off if I use the following combination of keys: fn + left/right key and after I made the combination, I press a random key to turn back on my monitor. And ofcourse the monitor turns on with different brightness. (Weird..)
To Control Panel > Power Option I don't find anything about brightness. If I reinstall my OS, I see the bar with brightness. Why at "clean OS" I see that bar, and late I don't find it anymore? see below a screenshot of Power Option.

My second problem is the annoying sound made after plug in/out the AC cable. I have the latest audio drivers. If I use the old versions, my laptop won't make anymore the annoying sound anymore.
The problem is, I don't want to use old drivers to fix this. It's very loud, expecially if I am on headphones. If I temporary mute the sound from the windows, I don't hear any sound from the laptop if I plug in/out the AC cable.
I want to know how can I change the sound of the plug in/out with another one? My mother have another Acer laptop, newer than mine, but at her the sound while plugin in/out the AC cable isn't so loud and annoying like mine.
Thank you for help,
JaJe.