BleepingComputer.com: Bro's laptop only shows a black screen when powered on.

My bro's laptop, an HP Pavilion dv6700, only has a black screen when powered on. The only test we've done so far is that it isn't the monitor because we connected it to another monitor and still nothing. We're going to use a hard drive enclosure to save the data off the hard drive. As for the computer itself, we'd just like to get it working again. What should we do? Again, we only get a black screen when turning it on, other than a few normal lights being on, like the power button and other normal indicators. And the computer fan can be heard spinning.
Thank you