Polycom ViewStation EX4000 - Manual (Page 123)

Chapter 6 - Testing and Troubleshooting
© Polycom, Inc. 113
Fault Isolation
The following table lists symptoms, causes, and corrective actions
for equipment malfunctions.
Table 6-6. Fault Isolation
Problem Possible cause Corrective action
Monitor screen remains blank Monitor is not connected to
power Check all cables to equipment
Monitor is not connected to
endpoint equipment
Endpoint equipment is not
connected to power
System is in sleep mode Lift the remote control and point
it toward the remote sensor
Reboot process does not end Flash memory is full Turn off power to the system,
then press and hold the reset
switch while turning on power
Reboot process halts without
finishing File corruption Turn off power to the system,
then press and hold the reset
switch while turning on power
System displays a Softupdate
screen No power at PRI network
interface module Check cable between endpoint
and PRI network interface
module
PBX does not accept calls of
numbering type “unknown”
from PRI network interface
module Configuration problem Refer to the appropriate User
Guide for information about
configuring the PRI