I had to take apart my laptop (Dell Inspiron N4010, i3, 2gb, 300+gb HDD) to replace the screen recently. When I put it all back together, neither Windows 7 Home Premium, Ubuntu 13.10, Lubuntu 13.10, or a Chrome OS build (Latest from Hexxeh as of Jan 2014) will command the computer to sleep or shutdown properly. All that happens is the screen goes blank (all the lights indicate it is NOT sleeping) and it just sits there until I hold down the power button. Not ideal.
Frankly, this thing is a piece of crap, and Lubuntu is the only thing that runs well on it. Unfortunately, I'm broke. I'm a tech by trade, but don't know much of hardware specifically. I'm guessing I bumped some little thing that somehow prevents the computer from entering another power mode.
Any ideas would be awesome.