Asus RS120-E4/PA4 - Manual (Page 18)

Chapter 2: Hardware setup 2-2
2.1 Chassis cover
2.1.1. Removing.the.front.cover
1. Use a Phillips screwdriver to remove
the screw on each front end of the
top cover.
3. Firmly hold the cover and slide it
toward the rear panel for about half
an inch until it is disengaged from
the chassis.
2. Loosen the two thunbscrews on the
rear panel to release the top cover
from the chassis.
4. Released a drive tray by pushing
the spring lock to the right. Then ,
firmly hold the tray level and pull all
the drive trays out of the bay.