Hi, I have bought an Inspiron 15R 5521 recently. I am running with Windows 7 (64 Bit). The problem I am facing is that the screen display is dimmed when I start the windows with the power cord plugged in (with power on), but normal bright (which I usually require) when I start with just battery power. And the hot keys for the brightness adjustment is also not working. Kindly suggest me with a solution. Thanks in advance.
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