10-27-2013 06:16 PM
This could be an hardware issue.
You may conatct support in your computer : http://www.acer.com/worldwide/support/
If you have a unit from US or Canada, you may also live chat with an Acer technician at : Acer live chat
10-27-2013 08:09 PM
Looking at the BIOS file on the Acer download site for the G3620 (I cannot find AG3620) it appears you have an AMI BIOS.
If that is correct, 6 beeps indicates a 'Gate A20 failure'. In short, this means the keyboard controller IC has failed.
The resolution, of course, is to replace the keyboard controller.