Cover Removal Al - Zenith Z-200 series Owner's Manual

Page
3.9
General Service
Because of this, built into your computer are two sets of LEOs which
report diagnostics independent of the screen display. The diagnostic LEOs
are located on the I/O card and on the backplane board. To see these
LEOs, the cover of the computer must be removed.
Cover Removal
Refer to Figure 3.1 for the cover removal procedure.
1. Turn off the computer and unplug the line cord from the AC outlet.
WARNING: Hazardous voltages may be present inside the computer
whenever the line cord is connected to an AC outlet. Do not begin disas­
sembly before unplugging the unit.
2. If a monitor is connected to the computer, disconnect its cable and
set the monitor aside. Also disconnect the cables of any other
peripherals connected to the computer and set them aside.
3. Make sure that the keyboard lock is in the fully clockwise position
(unlocked).
4. Remove and save the screws that secure the top cover to the unit.
5. Remove the cover by sliding the cover to the front while holding
it up to avoid catching any wires, cables, or connectors. Set the
cover to one side.