GRASS VALLEY ATP-2000 User Manual page 85

Battery Replacement
Step 2: Panel Unit Disassembly
Step 2.2: Unit Disassembly
1 Place the unit display-side-down on a soft protecting cloth.
The unit's metal rear cover is facing you.
2 Locate the four rear cover retaining screws. (See Figure E-2.)
Rear cover
retaining screws
Fig. E-2: Rear Cover Retaining Screws
3 Remove these four retaining screws and keep them for the reassembly step.
4 Gently lift the cover away from the unit, turn it over and place it on the work surface
next to the unit. 
There is a wire connecting the rear cover to the unit. Do not disconnect.
See Figure E-3.
64
CAUTION
Do not lift the rear cover fully away from the unit because
there is a wire attached to the rear cover within the unit. 
Do not disconnect this wire.
Rear cover
Rear cover