Troubleshooting Terminal, Printer and Serial Device Connections - Edition 4 (32022-90030)

Chapter 2 25
Troubleshooting Procedures
Troubleshooting Pathway
problem is system-wide. The verifications require no particular
expertise; they are appropriate for general users. After this, it will be
clear if more detailed device, DTC, or LAN testing is needed.
2. Testing DTC-Device Connections. If necessary, use TermDSM for
more detailed diagnostics. This must be done at another device or
the console. Test DTC-device connections first. This can detect faults
within the device, the device cable, and parts of the DTC circuitry. If
DTC-device connections are not causing the problem, further DTC
diagnostics are suggested.
3. Testing the DTC. Using TermDSM, perform a DTC selftest. The
selftest can detect faults within specific field replaceable units (FRU)
of the DTC. If the DTC passes the selftest, the fault might be in the
LAN. Proceed with LAN diagnostics.
4. Testing the LAN. LAN troubleshooting is beyond the scope of this
manual. It generally requires special tools and the expertise of an
HP support representative.
Procedures to follow for the first three tasks in the troubleshooting
pathway for host-based management are summarized in the following
sections.