IBM i 830 Repair Manual page 31

v Failures that started after recent service or customer actions, system
upgrade, addition of I/O devices, new software, or program temporary fix
(PTF) installation.
v Failures occurring only during high system usage.
v Failures occur when people are close to the system or machines are attached
to the system.
2. Recommend that the customer install the latest cumulative PTF package, since
code PTFs have corrected many problems that seem to be hardware failures.
The customer can order the latest cumulative PTF package electronically
through Electronic Customer Support or by calling the IBM Software Support
Center.
Review the Service Recommendations in the Preventive Service Planning
(PSP) listing for any additional HIPER (high impact pervasive) PTFs. This
information is available from the IBM Software Support Center and are
ordered electronically through Electronic Customer Support using the Send
PTF Order command (SNDPTFORD). The Information Center at
http://www.ibm.com/eserver/iseries/infocenter information contains a
chapter on "Working with PTFs".
3. Review the latest hardware service information for symptoms that are related
to the problem.
Ask your next level of support for the latest information available.
4. If you have not already done so, use the maintenance package to see the
indicated actions for the symptom described by the customer. Attempt to
perform the on-line problem analysis procedure first. If this is not possible,
such as when the system is down, go to "Starting Point for All Problems" on
page 4.
Use additional diagnostic tools, if necessary, and attempt to cause the problem
to occur again.
Note: Ensure that the service information you are using is at the same level as
the operating system. For example, do not use Version 3 Release 1
manuals when servicing a system with software at Version 3 Release 6
level.
5. Check the site for causes of electrical noise that match the start of the
intermittent problems. Ask the customer such questions as:
v Have any external changes or additions, such as building wiring, air
conditioning, or elevators been made to the site?
v Has any arc welding occurred in the area?
v Has any heavy industrial equipment, such as cranes, been operating in the
area?
v Have there been any thunderstorms in the area?
v Have the building lights become dim?
v Has any equipment been relocated, especially computer equipment?
Find the source of the electrical noise and prevent the noise from getting into
the system.
6. Ensure that site temperature and humidity are compatible with system
specifications. See web site
http://www.as400.ibm.com/tstudio/planning/plngstrt.htm for site physical
planning information.
Acceptable operating conditions are:
v Temperature: 10° C to 37.8° C (50° F to 100° F)
Intermittent Problems
Chapter 1. Starting Problem Analysis
17