Check with an external monitor and see if it shows you anything.

this problem may have been solved but just to add..try taking battery and charger out, hold the power button for up to 1 minute then tap it off and on for a further minute. Allow the laptop to sit without battery or AC power for 20 minutes and then boot up. Apparently this gets rid of any static build up that is preventing boot. It's on quite a few web sites...works for some, didn't work for me!

you need to do a bios flush. It is simple, google acer aspire one bios flush and you will get ur answer. Download files on a empty mem stick and folow the procedure. I did mine a couple of times

Update

download new bios from http://sites.google.com/site/maclesblogs...

The AA1 has a built-in BIOS recovery routine, making it possible to flash the BIOS even if the system doesn’t boot anymore. It’s only meant for emergencies and may void your warranty, so use at your own risk.

Follow every step carefully!

First format an USB stick with FAT.

Download the latest BIOS, and put both FLASHIT.EXE and the BIOS file in the root directory of the stick. Rename the BIOS file to ZG5IA32.FD, that’s important. Do not remove the USB stick.

Turn the AA1 off, make sure both battery and AC adapter are connected. Press Fn+Esc, keep it pressed and press the power button to turn the AA1 on. Release Fn+Esc after a few seconds, the power button will be blinking. Press the power button once. The AA1 will now initiate the BIOS flash, do not interrupt it under any circumstances. After a while the power button will stop blinking, and the AA1 will reboot shortly after. Wait patiently.

The BIOS has been flashed and all settings reset to default.

If for some reason you made a mistake during the procedure and it doesn’t reboot by itself wait 5 minutes before turning it off, just to be safe that it isn’t still flashing the BIOS.

my acer aspire one ont working.power light on.but no display.wot happen to it?i cheked with external monitor.but its also no disply.pls help...!