Troubleshooting Terminal, Printer, and Serial Device Connections - Edition 5 (32022-90058)

Troubleshooting Procedures
Troubleshooting Pathway
Chapter 2
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Troubleshooting Pathway
A practiced method for problem resolution is to first identify the problem and then
identify alternative causes of that problem. Break the big problem into smaller, more
manageable components. By breaking the problem into manageable and testable
components, the cause can be easily isolated. A recommended troubleshooting pathway
is shown in Figur e2-1.
Figure 2-1
Each of the numbered circles is a task used to troubleshoot problems in networking
environments. By completing these tasks, isolation of the cause of the problem is likely
to occur; this is the most difficult part of troubleshooting. After the cause of the problem
has been identified, take an appropriate action to resolve the problem. Each task is
described below.
1. Troubleshooting at the Device. First, do some simple verifications at the device. This
can rule out causes such as improper device settings and loose connections. Simple
observations can also indicate if the 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.