HP J3188A, Installation And Reference Manual

Page: 27 / 100

2-3
Troubleshooting
LED Operation
T
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LED Operation
The tables on the following pages list the hub’s LEDs, their possible states,
and diagnostic tips to resolve any error conditions.
LED patterns indicating problems Diagnostic Tips
Power Coll Port LED Sec Fault RPS
OFF * * * * * Verify that the power cord is plugged
into an active power source and to the
hub. Make sure these connections are
snug. Try power cycling the hub by
unplugging and plugging the hub back
in.
If the Power LED is still not on, verify the
AC source works by plugging another
device into the outlet. Or try plugging
the hub into a different outlet or try a
different power cord.
If this condition persists, call your
HP-authorized LAN dealer or HP
representative for assistance.
ON * OFF * * * Check cabling on the indicated port all
the way out to the device attached to
that port. Faulty wiring or a bad
connection could exist somewhere in
that connection.
The end node or hub attached to the
port is off.
The port may be disabled. Use the
ASCII console or management
application to enable the port.
If Port 16, check the position of the
MDI/MDI-X switch. See the figure in
chapter 1 that details the MDI/MDI-X
switch.
ON ON * * * * Very frequent collisions are occurring,
which could indicate a network fault or
improperly terminated cable.
*This LED is not important for the diagnosis.
MUCHO.BK : ch2.fm5 Page 3 Thursday, June 26, 1997 11:37 AM