Replacing The Display Board - 3Com NETBuilder II Installing Instruction

Replacing the To replace the display board in the 4-Slot chassis, follow these steps. You will
Display Board need a #1 Phillips screwdriver.
1 Turn off the system and unplug the power cord from the outlet and
power supply.
2 If your system is mounted in a rack, remove it from the rack, and remove the
rack-mount brackets from the chassis.
3 Remove the cover from the chassis.
a Remove the screws from the back and sides of the chassis.
b Slide the cover toward the back of the chassis and lift it off.
4 Remove the front panel.
a From inside the chassis, remove the two screws from the front panel.
b Gently tip the panel forward.
c Lift the panel out of the hinges at the bottom of the chassis.
Figure 1-18 Front Panel Screws on 4-Slot Chassis
5 Slide the display board ribbon cable out of the cable clamp on the bottom of
the chassis.
6 Remove the display board.
a Remove the four screws that secure the display board to the front of the
chassis.
b Gently pull the card away from the front panel and disconnect the ribbon
cable from the connector on the card.
7 Reinstall the display board.
a Reconnect the display board ribbon cable.
b Align the screw holes on the card with the guide posts.
c Reinstall the four screws.
8 Slide the display board ribbon cable into the cable clamp.
9 Reinstall the front panel.
a Tip the top edge of the panel slightly away from the chassis, and align the
tabs on the bottom with the hinges at the bottom of the chassis.
b Push the front panel against the chassis. From inside the chassis, reinstall the
two screws that secure the panel to the chassis.
Front panel
Inside front of chassis
Screws
Maintenance and Repair 1-17