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INSTALLATION
To change the U3 PROM chip on the KBD motherboard:
1. Log off of the keyboard and then unplug it (note which port you unplugged it from; if you plug the cable back into the wrong port after the procedure, your
screen will be blank and you might draw the wrong conclusion as to the reason why).
2. Turn the keyboard over on its back and remove the 9 phillips screws that attach the bottom plate. Refer to Figure 1; pay attention to the text references in
the figure.
NOTE:
The screw towards the middle of the keyboard has a plastic retaining nut (on some models). This screw must be removed LAST (it
is referenced as screw #9 in Figure 1). Remove all other screws FIRST, then lift the back cover off slightly; reach in carefully to
locate and hold the nut in place with your finger to keep it from turning and remove the last screw.
CAUTION
:After the last screw is removed, lift off the bottom plate of the keyboard CAREFULLY and GENTLY in the direction indicated in
Figure 2. Of the several wires that have their destination in the boot cover for the joystick, are several fine wires that are soldered
to the surface of the motherboard. Rough handling could cause a wire to detach inadvertently.
Figure 1.
Removing the CM9760-KBD Bottom Cover