Chassis Test Codes; Introduction; Interpreting Chassis Codes - HP 743 Service Handbook

Chassis Test Codes

This section provides information on interpreting chassis codes. It also provides a table
which you can use to reference the chassis codes and the associated troubleshooting
actions.

Introduction

Hexadecimal numbers are displayed during start up and other tests. These numbers repre-
sent tests and failures occurring in the board computer. Tables in this section list the chas-
sis codes and their meanings.
When displayed, chassis codes are shown in this format:
0x41080
Use the tables in this section to find the chassis code. The tables do not include the "0x"
prefix. Look up chassis codes by their numbers only, as shown:
41080

Interpreting Chassis Codes

When the board computer starts up, several chassis codes can be seen scrolling up from
the display's bottom. If the scrolling stops, perform the following steps:
1 Note the chassis code displayed at the bottom of the display.
2 Look up the chassis code in the chassis code tables, then find out what its function, test
or error description is.
3 If a non-error description, or an error message is found, the field replaceable unit
(FRU) that is indicated as processing that function should be replaced.
For example, if the scrolling chassis codes stop with 0x2408F at the bottom of the display,
perform the following steps to troubleshoot the problem:
1 Find the chassis code section that has the 2408F chassis code.
2 Refer to the chassis code tables to find 2408F.
3 Read chassis code description for 2408F: `Co-processor fail,' tells you the CPU chip's
co-processor has failed.
If a test or function chassis code stays at the display bottom and the board computer no
longer functions, something is preventing the board computer from continuing.
Troubleshooting
Chassis Test Codes
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