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Dell Inspiron 1720 laptop brightness problem.

For some reason, I am unable to raise the brightness to max when my 1720 laptop is plugged in. I am, however, able to raise the brightness to max while on battery. If I raise it to max while on battery and then plug it in, the brightness goes down automatically and I am unable to raise back to max, unless I unplug it again. That seems backwards to what should happen.

I'm running windows Vista, but I doubt that matters. I've checked my power plan/brightness settings and cannot figure out what's wrong. Thanks ahead of time for your help.

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Try the Dell forum.

In reply to: Dell Inspiron 1720 laptop brightness problem.

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Same Problem

In reply to: Try the Dell forum.

I have this same problem, and it seems that link is now broken. I was redirected to the forums but no particular thread.

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In reply to: Same Problem

I fixed this with more googling. The BIOS got tripped somehow. So to solve this, enter the BIOS (F2 as computer is booting at the Dell splash screen). In the video tab, there's options for brightness. Adjust that as you see fit. I maxed out both battery and AC brightness, because, well, I like to see my work.

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