Acer Apire One won't start

Changed the boot sequence and now I only get a black screen. Any ideas at to how to get back in; desperate.

Your BIOS has lost its mind. This is a very common problem. Google “bios flash aspire one” and you will find the fix. It’s fairly easy to do if you have a USB flash drive. Even a small drive will do.

Thank you for your help and I found instructions but I am a bit confused about which one is the bios file I need. I found the flash it exe. file can you give me a hand here.