System Power-On Process; Rmc Diagnostics - Compaq ES40CSLP Installation, User & Service Manual

6.5.2 System Power-On Process

The power-on sequence is as follows:
4. When the power cord is plugged into the wall outlet, 5V auxiliary AC voltage is enabled.
The LEDs on the power supply are lit, and the system power controller and RMC are
initialized. The power supply is tested. If the power supply is bad, power-up stops.
5. Pressing the Power button on the control panel or issuing the power-on command from the
RMC turns on power to the power supplies, CPU converters, and VTERM regulators. The
converters and regulators are tested. If any converter or regulator is bad, power-up stops.
6. CPU_DCOK and SYS_DC_OK are set to "true," which means DC power on the CPUs and
system DC power are okay. All CPUs load the initial Y divisor (clock multiplier). The
OCP power LED is lit.
7. SYS_RESET is set to "false." This setting releases the system motherboard logic and PCI
backplane logic from the Reset state.
8. The primary CPU is selected and CPU_(P)_RESET is set to "false." This allows the
primary CPU to attempt to load Flash SROM code.
9. If the primary CPU is good, it loads Flash SROM. If the primary CPU bad, the system tries
the next available CPU and if that CPU is good, it becomes the primary. The remaining
CPUs load Flash SROM. The SROM power-up then continues, as described in Section
6.5.4.

6.5.3 RMC Diagnostics

During power-up, RMC messages are sent to the operator control panel.
Table 6-6 lists the informational messages and error messages that the RMC might display on
the control panel. Fatal error messages from the RMC take precedence over SROM messages
and SRM messages. A fatal RMC message usually indicates a condition that causes the system
to shut down.
RMC messages that indicate failed components preempt SROM and SRM error messages, even
if the system is able to continue powering up. For example, if the RMC finds a bad CPU, it
sends a message to the OCP. If a good CPU is found and the system successfully powers up to
the console, the message indicating the failed CPU is the last message displayed on the OCP.
Compaq ES40CSLP Rackmount System Installation/User/Service Guide 6–9
Troubleshooting and Diagnostics