text: my acer apspire 3000 laptop automatically shuts off randomly, even thought it is plugged in. please help...? i bought it in july so, it's not that old. my laptop is usually plugged into my ac adaptor it's probably overheating.  are the openings clear when you use it?  sometimes if you put it on your lap you block the openings.  also, make sure there's no dust inside it.  th dust can make it overheat.  hey, it's still under warranty, male acer fix it!