90     IBM Desktop System HMM
Cover
•
Disconnect the system unit power cord.
•
Remove the 4 screws at the back of the tower.
•
Insert a screwdriver under one of the tabs on the 
back of the cover and gently pry the tower cover so 
that it separates from the tower.
•
Slide the cover back about half inch (or 1.25 
centimeters).
•
Lift the cover up by the top front and back edges, 
pulling the sides out and away from the tower.
NOTE: 
 To prevent the tower from tipping over, you 
may want to lay the tower on its side on a work 
surface, such as a table.
•
Touch the bare metal frame of the system to 
dissipate any static electricity from your body (do 
not touch any of the components inside the frame 
until you have done this). Do not touch any 
component(s) with a voltage warning label.