Power Indicator Codes For Power Supply - Dell PowerEdge T20 Owner's Manual

Indicator Indicator Code
Orange — a good 1000 Mbps connection exists between the network and the
system.
Off (no light) — the system is not detecting a physical connection to the network.
Network activity Yellow light — A blinking yellow light indicates that network activity is present.
light on integrated
network adapter

Power Indicator Codes For Power Supply

Press the self-diagnostic button to perform a quick health check on the non-redundant power supply of
the system.
Diagnostic Condition
Indicator
Pattern
Not lit Power is not connected or power supply is faulty.
Green A valid power source is connected to the power supply and the power supply is
operational.
Figure 4. Power Supply Status Indicator and Self-Diagnostic Button
1. AC power supply status indicator
10
2. self-diagnostic button