Sonnet Technologies Crescendo_PB Processor Upgrade Card - Manual (Page 6)

Troubleshooting
This section addresses issues encountered by some Crescendo/PB users.
Problem:
Although the A/C power adapter has been reconnected, there is no startup
tone when the PowerBook is turned on.
Solution:
Does the sleep light on the upper right corner of the screen stay on
(green)?
Yes: The PowerBook power management circuit needs to be completely
reset. To do this, disconnect all peripherals and power sources (battery
and A/C power adapter) from the PowerBook. Use a small piece of
tape to hold the On/Off key down and leave the PowerBook in this
configuration overnight (8-10 hours). It is normal if clicking sounds
from the speaker are audible during this procedure. Repeat step 22 of
the installation procedure.
No: The PowerBook power management circuit may need to be reset
longer than the 30 seconds in step 21 of the installation instructions.
Disconnect all peripherals and power sources (battery and A/C power
adapter). Hold the On/Off key down for several minutes. It is normal
if clicking sounds from the speaker are audible during this procedure.
Repeat step 22 of the installation procedure.
The Crescendo card may not be installed properly. After attempting
the above extended reset procedure, verify the Crescendo card is
installed properly.
Quick Start Guide for Crescendo/PB
6