no one really bounces their laptop around--but--just riding in a vehicle or being carried in a backpack can cause bouncing--Acer doesn't appear to make an X73S--but Asus does--so which is it?
IF Acer there should be an access door on bottom.
in an earlier post someone mentioned using CPU ID--it's free and you can get it here: CPUID - System & hardware benchmark, monitoring, reporting
download install and run it--it will show tons of info about your ram, motherboard, cpu and BIOS version which makes it easy to diagnose beep codes.
once you know what version BIOS (Mainboard Tab in CPU-Z) you have you can look up the beep codes here: How To Troubleshoot Beep Codes