Toshiba QOSMIO G40 Maintenance Manual page 71

2.4 System Board Troubleshooting
D port status
(F103h)
F104h
F105h
F106h
QOSMIO G40 Maintenance Manual (960-632)
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Table 2-4 Debug port (Boot mode) error status (4/10)
Inspection items
Resume error process
Copying ROM/RAM of system
BIOS
Security check
SMRAM initialization
APIC initialization
WakeUp factor check
SMRAM base rewriting and CPU
state map saving for BIOS
Permission of SMI based on ASMI
Initialization of devices which need
initialization before PCI bus
initialization.
2 Troubleshooting Procedures
Details
Expansion memory checksum check
resume error (Resume error =F176H)
PnP RAM checksum check (Resume
error F177H)
Transition to RESUME-MAIN
Reset of CPU clock to low
Prohibition of all SMI
Clearance of resume status
Return to ROM
Turning area of C0000h to EFFFFh to
PCI (Prohibition of DRAM)
Setting of resume error request
(HLT, when error occurs)
PIT test (Cold boot only) and initialization
Setting of test pattern to channel 0 of
PIT#0
Check whether the set test pattern can
be read
Initialization of PIT channel 0, Setting of
timer interruption interval to 55ms
Initialization of PIT channel 2, Setting of
the sound generator frequency to
664Hz
Test of PIT channel 1 (Check whether
the refresh signal works normally in 30
micro-s refresh interval.) HLT, when the
time is out.
Test of PIT channel 2 (Check whether the
speaker gate works normally.)
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