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Blue Screen Again
Posts: 1
Registered: ‎07-21-2011
Location: Canada
Message 1 of 3 (4,387 Views)

Can't Adjust Brightness on E420!

I just got my E420 yesterday and I'm quite happy with it... but my battery is a bit loose on the laptop which kind of annoys me... and the right button makes a clicky noise when I press it, like the bottom right side of the keyboard isnt fully intact. Lastly, the brightness stayed constant when i tried to adjust it... 

I've tried using the keyboard (F7 and F8), i've also tried it changing the settings thru Power Manager... but no luck ;(


What can i do to fix this? >_<


Another question, does the laptop use energy directly from outlet after battery is fully charged? Like it doesn't use the energy from battery and having the battery charging constantly...


Former Employee
Posts: 2,437
Registered: ‎04-10-2011
Location: Malaysia
Message 2 of 3 (4,339 Views)

Re: Can't Adjust Brightness on E420!

hey MaggieThinkPad,

on the part of the brightness, uninstall Hotkey and Power Manager. go to and download the latest and install.

and nope, the battery will stop charging when it is completely charged. So when its at 100% and the adapter is connected, the laptop will use adapter power.

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Paper Tape
Posts: 5
Registered: ‎06-13-2009
Location: California, USA
Message 3 of 3 (1,741 Views)

Re: Can't Adjust Brightness on E420!

Here is a link to the only post in that helped me on this:

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