2 Troubleshooting Procedures 2.5 FDD TroubleshootingSystem Board Troubleshooting Table 2-3 Printer port LED boot mode status (3/8) LED Status Test item Message
Initialization of CMOS data (1)
(Boot status and IRT busy flag, the remaining bit is 0.)
(02H)
Setting of IRT status
Storing DRAM size in CMOS
Not resume when a CMOS error occurred
Not resume when resume status code is not set
Resume error check
1CH Power Failure error (Resume error 7AH)
SM-RAM checksum check (Resume error 73H)
Check of memory configuration change (Resume error
73H)
RAM area checksum check in system BIOS (Resume
error 79H)
PnP RAM checksum check (Resume error 77H)
Resume branch (at Cold Boot)
Transition to RESUME-MAIN
Reset of CPU clock to low
Prohibition of all SMI
Clearance of resume status
Return to ROM
Designating the area of C0000h-EFFFFh to PCI
(Prohibition of DRAM)
Resume error
Setting of resume error request
03H
System BIOS ROM/RAM copy
SM RAM initialization
Check of Wake Up factor
Rewriting of SMRAM base and
Storing CPU state map for BIOS
04H
Enabling SMI only by ASMI
PIT test (at Cold Boot) and initialization
Setting of test pattern for PIT#0 CH0
Check whether the test pattern set can be read.
Initialization of PIT CH0 (Setting of timer interrupt interval
to 55ms)
Initialization of PIT CH2 (Setting of sound generator
frequency to 664Hz)
05H Initialization of a device which
needs initialization before
initialization of PCI bus
Test of PIT CH1 (Check whether a refresh signal is
working properly when refresh interval is set to 30ms.
HLT when the time is out.)