4-2
Troubleshooting
Diagnosing with the LEDs
Diagnosing with the LEDs
When resetting the switch, or during a power-on self test (POST), LED patterns on
the switch may indicate a problem condition.
1. Check in the table below for the LED pattern you see on your switch.
2. Refer to the corresponding diagnostic tips on the next few pages.
Diagnostic tips:
LED Pattern Indicating Problems
Diagnostic
Tips
Power Fault PD LED
3
Port LED
Off with power cord
or power adapter
plugged in
1
Off
1
➊
On Prolonged On
11
➋
On Blinking
2
1
Blinking
2
➌
On Off
1
Off with cable
connected
➍
Off Off Off with cable
connected to
port 1
3
1
➎
1
This LED is not important for the diagnosis.
2
The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.
3
Applies only to the HP PS1810-8G Switch.
Tip Problem Solution
➊
The switch is not
plugged into an active
AC power source, or
the power adapter (if
applicable) of the
switch might have
failed.
1. Verify that the power cord or power adapter is plugged into an active AC power
source and to the switch. Make sure these connections are snug.
2. Try power cycling the switch by unplugging the power cord or power adapter
from the AC outlet and then plugging it back in.
3. If the Power LED is still not on, verify that the AC power source works by plugging
another device into the outlet, or try plugging the switch into a different outlet,
or try a different power cord (if applicable).
If the power source and power cord are OK and this condition persists, the switch’s
internal power supply or power adapter might have failed. Call your HP authorized
network reseller, or use the electronic support services from HP to get assistance.
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