5-3
5
TABLE 5-1 TROUBLESHOOTING GUIDE (CONT.)
Possible
Symptom
Fault
Action or Check
Unit does not
LAN LED off
Network not detected.
respond to client PC after 30 seconds
No network cable or local
hub/switch. Check hub/switch
power. Replace Ethernet cable.
Wrong cable type. Use a cross-
over cable to connect directly
to a PC. Use a standard cable
to connect to a hub or network
switch.
No network. Check hub,
switch or PC for proper opera-
tion
LAN LED on
No network messages
ACT LED never on received by the N4865A.
Check PC IP settings. Settings
must match N4865A's settings
for proper communication.
N4865A not set to factory
defaults. Hold Rest button in
while power cycling the unit.
See para 5.5.
LAN LED on
Possible link error. Link to
ACT LED blinks
correct N4865A or IP address.
Not linked to a LAN RDY LED blinking Instrument LAN connections.
Instrument
Be sure LAN instrument is
connected directly to the
N4865A or to it via a local hub
Hub or switch error. Power
cycle the hub or switch.
Instrument IP settings wrong.
Check settings. See para 2.4-1
LAN Instrument
N4865A in Local
Send the N4865A a Selected
not in Remote
Device Clear command with
REN on or send the N4865A an
Enable Remote command.
Symptom
Fault
Action or Check
Unit does not
LAN LED off
Network not detected.
respond to client PC after 30 seconds
No network cable or local
Wrong cable type. Use a cross-
No network. Check hub,
LAN LED on
No network messages
ACT LED never on received by the N4865A.
Check PC IP settings. Settings
must match N4865A's settings
for proper communication.
N4865A not set to factory
defaults. Hold Rest button in
while power cycling the unit.
See para 5.5.
LAN LED on
Possible link error. Link to
ACT LED blinks
correct N4865A or IP address.
Not linked to a LAN RDY LED blinking Instrument LAN connections.
Instrument
Be sure LAN instrument is
connected directly to the
Hub or switch error. Power
Instrument IP settings wrong.
Check settings. See para 2.4-1
LAN Instrument
N4865A in Local
Send the N4865A a Selected
not in Remote
Device Clear command with
REN on or send the N4865A an
Enable Remote command.
Symptom
Fault
Action or Check
Unit does not
LAN LED off
Network not detected.
respond to client PC after 30 seconds
No network cable or local
Wrong cable type. Use a cross-
No network. Check hub,
LAN LED on
No network messages
ACT LED never on received by the N4865A.
Check PC IP settings. Settings
must match N4865A's settings
for proper communication.
N4865A not set to factory
defaults. Hold Rest button in
while power cycling the unit.
See para 5.5.
LAN LED on
Possible link error. Link to
ACT LED blinks
correct N4865A or IP address.
Not linked to a LAN RDY LED blinking Instrument LAN connections.
Instrument
Be sure LAN instrument is
connected directly to the
Hub or switch error. Power
Instrument IP settings wrong.
Check settings. See para 2.4-1
LAN Instrument
N4865A in Local
Send the N4865A a Selected
not in Remote
Device Clear command with
REN on or send the N4865A an
Enable Remote command.
Summary of Contents for N4865A
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