IBM 7870B4U, Service Manual

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If the problem remains, contact IBM or an approved warranty service provider
for assistance with additional problem determination and possible hardware
replacement. To open an online service request, go to http://www.ibm.com/
support/electronic/portal/. Be prepared to provide information about any
error codes and collected data.
Undocumented problems
If you have completed the diagnostic procedure and the problem remains, the
problem might not have been previously identified by IBM. After you have
verified that all code is at the latest level, all hardware and software configurations
are valid, and no light path diagnostics LEDs or log entries indicate a hardware
component failure, contact IBM or an approved warranty service provider for
assistance.
To open an online service request, go to http://www.ibm.com/support/electronic/
portal/. Be prepared to provide information about any error codes and collected
data and the problem determination procedures that you have used.
Chapter 1. Start here
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