Hello. I use an Acer laptop, and I've been leaving it on quite a lot lately to download stuff. I left it on for about 18 hours, which I do on occasion, and it seemed fine till I powered it down. But now, I tried to switch it on, and the monitor has gone dark. I can see very, very, very faint traces of what's supposed to be onscreen, but it's pretty much mostly a sea of black. Does anyone know what the problem might be? Burned fuse, or something? And how can that problem be solved? Is it just a matter of replacing a bulb or wire? Or it is a big, costly process to get it fixed? Thanks so much for all your help!