System Startup, Configuration, and Shutdown Reference Manual (32650-90907)

Appendix A
Using the Access Port (AP)
Configuring the Console
183
Failure of the AP drive circuitry causes this error to be detected, and the SPU is not reset.
The circuitry that permits the AP to read this line may have failed. If this is the case, the error message is
displayed, but the SPU is reset in the proper manner.
The CIO backplane may contain a short between the RESET_SYS- line and another low impedance line that is
driving a high-logic level.
Some other device connected to the RESET_SYS- line may be driving a high-logic level that the AP cannot
overdrive.
MESSAGE: RESET_SYS backplane signal asserted, but unable to verify SPU deassertion of PPON
backplane signal (APERR 02)
CAUSE: This message, generated during execution of the RS command, indicates that the PPON backplane
signal is not deasserted within 2 seconds after the RESET_SYS- line is asserted.
This error may be caused by three conditions. If the receiver, which senses this state of this line on the AP, has
failed, the system displays the message. The SPU resets normally. The AP also resets itself as soon as the RS
command has completed, if this is the cause of the failure.
If the wiring between the assembly that receives RESET_SYS- and the AP is defective, neither the SPU nor AP
resets.
If the portion of the power system that generates PPON is defective, the SPU does not reset, and the AP
probably does not reset.
MESSAGE: PPON not reasserted by SPU after RESET_SYS deassertion (APERR 03)
CAUSE: This message, displayed by the RS command, means that PPON has not reasserted within 2 seconds
after being deasserted. Once this occurs, the AP becomes insensitive to being reset by the deassertion of
PPON.
This error is most likely the result of a fault in the assembly that generates the PPON signal.
MESSAGE: Unable to verify assertion of TOC_SYS backplane signal (APERR 04)
CAUSE: Information not currently available.
MESSAGE: AP Self-Test failed subtest xx (APERR 05)
CAUSE: This message is displayed when a failure occurs during the execution of AP self-test. XX gives the
decimal number of the failing subtest.
MESSAGE: AP failed subtest xx of idle Self-Test. (APERR 06)
CAUSE: This message is displayed when the idle self-test fails.
Since idle self-test executes whenever the AP microprocessor has idle time, this message may appear at any
time, in any AP context, including during console mode operation.
MESSAGE: AP failed subtest xx of prior idle Self-Test. (APERR 07)
CAUSE: This message is displayed when a switch in modes is made after idle self-test has failed previously.
MESSAGE: Permitted accesses to NVM exceeded. (APERR 08)
CAUSE: This message is displayed each time that the AP accesses NVM after the counter in NVM indicates
that the permitted number of accesses to the last block of NVM has been exhausted. The AP should be
replaced at the next visit by HP service personnel. The NVM may survive for up to 20,000 more accesses after
this message begins to occur, or it may fail almost immediately.
MESSAGE: CRC error on NVM. (APERR 09)