Compaq AlphaServer ES40, Service Manual

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3-2 Compaq AlphaServer ES40 Service Guide
3.1 Overview of Power-Up Diagnostics
The power-up process begins with the power-on of the power supplies.
After the AC and DC power-up sequences are completed, the remote
management console (RMC) reads EEROM information and deposits it
into the DPR. The SROM minimally tests the CPUs, initializes and tests
backup cache, and minimally tests memory. Finally, the SROM loads
the SRM console program into memory and jumps to the first
instruction in the console program.
There are three distinct sets of power-up diagnostics:
1.
System power controller and remote management console diagnostics—
These diagnostics check the power regulators, temperature, and fans.
Failures are reported in the dual-port RAM (DPR) and on the OCP display.
Certain failures may prevent the system from powering on.
2. Serial ROM (SROM) diagnostics—SROM tests check the basic functionality
of the system and load the console code from the FEPROM on the system
motherboard into system memory. Failures during SROM tests are
indicated by error beep codes and messages on the serial console terminal
and the OCP.
3.
Console firmware diagnostics—These tests are executed by the SRM console
code. They test the core system, including boot path devices. Failures
during these tests are reported to the console terminal through the power-
up screen or console event log.