Right click desktop, properties, look under the screen saver tab.
You will see power at the bottom. Set up your laptap here.
If that doesnt have enough settings. When you start up your computer, you can access bios by pressing DEL or a F key.
You will find many power settings in there you can adjust brightness and power saving settings. If you leave it plugged in, turn it up. But I know once you remove the ac power plug to the wall, the lcd monitor will instantly go dim. It notices the power went from wall supplied to now battery. So it will try to save battery life. It's the default setting on almost every laptop. The 2 methods I just refereed to will help you adjust what best fits your needs.
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