My Acer Aspire One was fine a couple days ago, but now when it turns on, nothing comes on the screen, nothing happens.

Acer Aspire One Won't Boot (BIOS corrupted)After switching off the aa1, when trying to turn it on again, it justshows blinking leds and the fan is turning. But the screen remainsblack.
If your aa1 does like this probably its BIOS has been damaged...

Luckilythe Acer Aspire One has a built-in BIOS recovery routine, making itpossible to flash the BIOS even if the system doesn't boot anymore.

Pleasenote that the process I'm about to describe is only meant foremergencies and may void your warranty, so use at your own risk.

1) Format a USB memory key with the FAT mode.
2) Download the latest version of the BIOS from Acer support website:

• HERE if you have a Aspire One A150
• HERE for the Aspire One A110

3) Extract the files from the zip and put both the FLASHIT.EXE and the BIOS file in the root directory of the memory key.
4) Rename the BIOS file to ZG5IA32.FD and then remove the disk.
5) Turn the AA1 off, insert the battery and connect the AC adapter.
6) Insert the USB Memory Key into one of the USB port of the Aspire One.
7) Press Fn+Esc, keep it pressed and press the power button to turn the AA1 on.
8) Release Fn+Esc after a few seconds, the power button will be blinking.
9)Press the power button once. The AA1 will start the BIOS flash, do notinterrupt for any reason. After some minutes the power button will stopblinking, and then the AA1 will reboot. Wait till the AA1 has completedall this operations.

If everything has gone right, the BIOS is flashed and all settings are reset to default.

Vista or xp?