won't boot no bios on the bottom of screen
displays [please wait ] i have no operating system installed ; but it should still have bios so i can install one ???

acer aspire 3680

If the computer boots, there is a bios.

A computer will boot using BIOS then bootstrap the operating system.

Have you tried going into the bios setup and verify everything looks normal? (Check to see if it is finding all of your memory ect...)

One thing would to do as well would be to download a live CD for a linux distro to see if you are misinterpreting the relationship between BIOS/OS.

You can get a live CD for lubuntu here.