2.4 System Board Troubleshooting
2 Troubleshooting Procedures
Table 2-5 Printer port LED status (1/8)
LED Status
Test item
Contents
Start
Permission of A20 and Clear of software reset bit
Prohibition of APIC
Initialization of MCHM
Initialization of ICHM
Initialization of Super I/O
Initialization of debug port
Dummy read of 3
rd
Bus data
Setting of printer port
B0h
Flash ROM check
PIT CH0 initialization (for HOLD_ON)
BIOS rewrite factor flag initialization
CHECK SUM CHECK
Transition to protected mode
Boot block checksum (skip when returned to S3)
The program halts when checksum error
occurred.
Checksum other than boot block (skip when
returned to S3)
EC/KBC rewrite check
B1h KBC
initialization
If “rewrite” is requested, go to “BIOS rewrite
process”.
Transition of process to System BIOS IRT when
returned to S3)
Key input
Check of Tilde key (
key) and Tab key if a key
is pressed
B2h
BIOS rewrite request check
BIOS rewrite request check if Checksum check
error occurred on except Boot Block or rewrite is
required by user. “BIOS rewrite process”.
Transits to System BIOS IRT.
Initialization of ICHM. D31
DRAM configuration
Permission of cache (L1 cache only)
Memory clear
B3h BIOS
rewrite
(1)
Transition to real mode and copy of BIOS to RAM
B5h
Saving of key scan code
Initialization of TASK_1ms_TSC setting screen
B6h BIOS
rewrite
FAN control
Sound initialization (for BEEP sound)
System speaker enable
Satellite A40 Maintenance Manual (960-458)
2-23
Содержание Satellite A40 Series
Страница 10: ...x Satellite A40 Maintenance Manual 960 458 ...
Страница 11: ...Chapter 1 Hardware Overview ...
Страница 12: ...1 Hardware Overview 1 ii Satellite A40 Maintenance Manual 960 458 ...
Страница 51: ...Chapter 2 Troubleshooting Procedures ...
Страница 52: ...2 Troubleshooting Procedures 2 ii Satellite A40 Maintenance Manual 960 458 ...
Страница 56: ...2 Troubleshooting Procedures 2 vi Satellite A40 Maintenance Manual 960 458 ...
Страница 117: ...2 14 SD Card Slot Troubleshooting 2 Troubleshooting Procedures Satellite A40 Maintenance Manual 960 458 2 61 ...
Страница 118: ...Chapter 3 Tests and Diagnostics ...
Страница 119: ...3 Tests and Diagnostics 3 ii Satellite A40 Maintenance Manual 960 458 ...
Страница 203: ...3 Tests and Diagnostics 3 29 Thermal Radiation Control Test 3 82 Satellite A40 Maintenance Manual 960 458 ...
Страница 204: ...Chapter 4 Replacement Procedures ...
Страница 205: ...4 Replacement Procedures 4 ii Satellite A40 Maintenance Manual 960 458 ...
Страница 358: ...Appendices ...
Страница 359: ...Appendices App ii Satellite A40 Maintenance Manual 960 458 ...
Страница 365: ...Appendices App viii Satellite A40 Maintenance Manual 960 458 ...
Страница 371: ...Appendices Appendix A Handling the LCD Module A 6 Satellite A40 Maintenance Manual 960 458 ...
Страница 411: ...Appendices Appendix E Key Layout E 4 Satellite A40 Maintenance Manual 960 458 ...
Страница 413: ...Appendices Appendix F Wiring Diagrams F 2 Satellite A40 Maintenance Manual 960 458 ...
Страница 415: ...Appendices Appendix G BIOS Rewrite Procedures G 2 Satellite A40 Maintenance Manual 960 458 ...
Страница 417: ...Appendices Appendix H EC KBC Rewrite Procedures H 2 Satellite A40 Maintenance Manual 960 458 ...
Страница 419: ...Appendices Appendix I Reliability I 2 Satellite A40 Maintenance Manual 960 458 ...