Identifying a failed power supply
Each power supply unit uses an LED that indicates whether the unit is working as expected. Figure 1
describes the LEDs that are displayed by the power supply units for the appliance:
The following table indicates the potential problems that can occur with the power supply and suggests
actions for you to use to correct the detected problems:
Table 1. Power supply LED combinations for detecting potential problems
AC
DC
Error
Description
Action
Notes
Off
Off
Off
No AC power is going to
the appliance, or there is a
problem with the AC
power source.
1.
Check the AC power
that is going to the
appliance.
2.
Make sure that the
power cord is
connected to a
functioning power
source.
3.
Turn off the appliance
and then turn the
appliance back on.
4.
If the problem
remains, replace the
power supply.
This condition is normal
when no AC power is
present.
Figure 1. Power supply LEDs
3
