Screen darkens when in battery mode

[Brian]

I just took my new Dell Inspiron 1420 out of the box yesterday, the OP is
Vista Home Premium. The screen's brightness is great when the computer is
plugged into the A/C adapter. But when I unplug the computer from the wall
and use the battery the screen darkens up quite a bit, to the point that it's
difficult to read. I changed the battery plan brightness level and that
didn't work. I've adjusted the brightness using the keyboard keys but that
didn't fix it either. Wondering if there's something I'm missing in the
settings or if maybe this laptop needs to be sent back to Dell. Any
suggestions?

 

[David B.]

Contact Dell support, they will be able to tell you what you need to do.