First i would make sure that you have power coming from the AC adapter. Pull your battery and all your memory and remove all device that are plugged in i.e printer,cam etc. as well as Your AC adapter,. Give it some time and then re-seat your battery. This should reset your Bios. The try to restart with a AC adapter to see, or better to hear, if you get any error code beeping. If you still get nothing, it is time to disassemble your Acer and see what damage you have on the power side of your motherboard. Take a look at the Aspire One [http://www.keepandshare.com/doc/2865033/aspireone-zip-june-11-2011-1-42-pm-4-2-meg?da=y|Service manual] and hopefully you get it going again. Good Luck