HP RP7 Model 7800 - Page 57

4. Slide down the two levers on the upper corners of the rear I/O panel (1) and rotate the cover off
(2).
5. Disconnect all cables from the rear I/O connectors.
6. Press inward on the buttons located near the bottom sides of the display head's back panel (1)
then slide the back panel up and off the display head (2).
Replacing the Battery 51