Selftest Failures (J280/282/2240 Only); Memory Failures - HP Visualize J2240 Service Handbook

Selftest Failures (J280/282/2240 only)

Chassis codes are the key to debugging selftest errors. If a failure is found during
selftest, chassis codes are displayed in the LCD. The procedure for using these codes
to debug a failure is as follows:
1.
Using the following tables, find the chassis code listed on the LCD.
Codes CB9x through CBFx in Table 4–16 are HPMC errors.
2.
A 7xxx code means a memory error. Figure 4–3 is a layout of the memory
DIMMs on the CPU board that goes down to the DIMM pair. To continue be-
yond the pair, run Offline Diagnostics.
To get additional information about failures from the boot console interface, use the
Service menu pim, pdt, and ChassisCode commands.

Memory Failures

The J Class system requires special Memory Page Deallocation (PDC) to be
implemented. This PDC feature allows the workstation to provide information to the
operating system about memory failures.
HP-UX 10.x uses PDC information to map out failing memory areas and continue
normal operation. You can use the command memrpt with the detail switch to obtain
information about the Memory Page Deallocation Table (PDT) as well as single bit
errors logged by the system.
/usr/sbin/sysdiag
#
logtool
Enter
DUI >
memrpt detail
LOGTOOL>
The PDT can also be checked using the pdt command in the Service menu of the
boot console handler (Refer to Chapter 9). If a failing DIMM is replaced, use the
command pdt clear in the Service menu to clear out the PDT.
4–34 Troubleshooting
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