Compaq nx9010 Maintenance and Service Guide - Page 115

Beep Codes 1-2-1-2 1-2-1-3 1-2-1-4 1-2-2-1 1-2-2-3 1-2-2-4 1-2-3-1 1-2-3-3 1-2-4-1 1-3-1-1 1-3-1-3 1-3-2-1 1-3-3-1 1-3-3-2 1-3-3-3 1-3-4-1 1-3-4-3 1-3-4-4 1-4-1-1 1-4-1-3 1-4-1-4 1-4-2-3 1-4-3-1 1-4-3-3 1-4-4-1 1-4-4-2 2-1-1-2 2-1-1-3 2-1-2-2 2-1-2-3 2-1-2-4 2-1-3-1 2-1-3-2 2-1-3-3 2-1-3-4 2-1-4-1 2-1-4-3 Service Manual POST Description Load alternate registers with initial POST values Restore CPU control word during warm boot Initialize PCI Bus Mastering devices Initialize keyboard controller BIOS ROM checksum Initialize cache before memory Auto size 8254 timer initialization 8237 DMA controller initialization Reset Programmable Interrupt Controller Test DRAM refresh Test 8742 Keyboard Controller (on motherboard) Set ES segment register to 4 GB Auto size DRAM; or wrong type or no RAM installed Initialize POST Memory Manager Clear 512 KB base RAM RAM failure on address line xxxx RAM failure on data bits xxxx of low byte of memory bus Enable cache before system BIOS shadow RAM failure on data bits xxxx of high byte of memory bus Test CPU bus-clock frequency Initialize Phoenix Dispatch Manager Warm start shut down Shadow system BIOS ROM Auto size cache Advanced configuration of chipset registers Load alternate registers with CMOS values Initialize extended memory for ROMPilot Initialize interrupt vectors POST device initialization Check ROM copyright notice Initialize I20 support Check video configuration against CMOS Initialize PCI bus and devices Initialize all video adapters in system QuietBoot start (optional) Shadow video BIOS ROM Display BIOS copyright notice Troubleshooting and Diagnostics 3-23