Service Guide
Page 87
... System board Stuck Key see "Keyboard or Auxiliary Input Device Check" on page 68. Unlock key switch Unlock external keyboard Monitor type does not match CMOS - Thermal critical High In this situation BIOS will issue 4 short beeps then shut down system, not show . Shadow... RAM Failed at offset: nnnn BIOS ROM System board System RAM Failed at offset: nnnn DIMM System board Extended RAM Failed at xxxx:xxxx:xxxxh (R:xxxxh, W:xxxxh) Real Time Clock Error CMOS Battery Bad CMOS...
... System board Stuck Key see "Keyboard or Auxiliary Input Device Check" on page 68. Unlock key switch Unlock external keyboard Monitor type does not match CMOS - Thermal critical High In this situation BIOS will issue 4 short beeps then shut down system, not show . Shadow... RAM Failed at offset: nnnn BIOS ROM System board System RAM Failed at offset: nnnn DIMM System board Extended RAM Failed at xxxx:xxxx:xxxxh (R:xxxxh, W:xxxxh) Real Time Clock Error CMOS Battery Bad CMOS...
Service Guide
Page 90
...38h 3Ah 3Ch 3Dh 42h 45h Beeps 1-2-2-3 1-3-1-1 1-3-1-3 1-3-4-1 1-3-4-3 1-4-1-1 82 POST Routine Description Verify Real Mode Disable Non-Maskable Interrupt (NMI) Get CPU type Initialize system hardware Initialize chipset with initial POST values Set IN POST flag Initialize CPU registers Enable CPU cache Initialize caches to initial POST values... Controller Set ES segment register to 4 GB Enable A20 line Autosize DRAM Initialize POST Memory Manager Clear 215 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...
...38h 3Ah 3Ch 3Dh 42h 45h Beeps 1-2-2-3 1-3-1-1 1-3-1-3 1-3-4-1 1-3-4-3 1-4-1-1 82 POST Routine Description Verify Real Mode Disable Non-Maskable Interrupt (NMI) Get CPU type Initialize system hardware Initialize chipset with initial POST values Set IN POST flag Initialize CPU registers Enable CPU cache Initialize caches to initial POST values... Controller Set ES segment register to 4 GB Enable A20 line Autosize DRAM Initialize POST Memory Manager Clear 215 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...
Service Guide
Page 91
...bus and devices Initialize all video adapters in system QuietBoot start (optional) Shadow video BIOS ROM Display BIOS copyright notice Display CPU type and speed Initialize EISA board Test keyboard Set key click if enabled Test for unexpected interrupts Initialize POST display service Display prompt "Press... F2 to enter SETUP" Disable CPU cache Test RAM between 512 and 640 KB Test extended memory Test extended memory address lines Jump to User Patch1 Configure advanced cache registers Initialize ...
...bus and devices Initialize all video adapters in system QuietBoot start (optional) Shadow video BIOS ROM Display BIOS copyright notice Display CPU type and speed Initialize EISA board Test keyboard Set key click if enabled Test for unexpected interrupts Initialize POST display service Display prompt "Press... F2 to enter SETUP" Disable CPU cache Test RAM between 512 and 640 KB Test extended memory Test extended memory address lines Jump to User Patch1 Configure advanced cache registers Initialize ...