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2
Troubleshooting Procedures
2.4
System
Board Troubleshooting
2-22
Portege M200 Maintenance Manual (960-457)
Table 2-3 D port status (1/7)
D port
status
Details
Remarks
Clearing software reset bit
Enabling address line A20
Initializing special registers and M1535
Initializing the CH0 of a PIT (for HOLD_ON)
Initializing flag for BIOS rewriting factor
CHECK SUM CHECK (FEFC0000h to FEFF7FFFh)
Shifting to protected mode
Examining the checksum of Boot Block
HALT when checksum is not correct.
F000h
Examining the checksum of data except Boot Block
F001h
Checking if EC/KBC firmware is to be rewritten
Shifting to BIOS rewriting process if
BIOS rewriting request exists
Executing KBC initializing sequence
Sending KBC enable command
Checking F12 key-in
F002h
Initializing security controller
F003h to
F005h
Checking whether BIOS rewrite is requested
Checksum error except Boot Block or
rewriting request by F12key-in
F006H
Checking BIOS signature
F007h
Shifting process to System BIOS IRT side
For BIOS rewriting process
BIOS rewriting process
Initializing unique HW for this model
Initializing GPIO I/O space
Enabling BIOS writing
Serial interrupt control
Canceling BIOS write protection
Enabling SMBus I/O space
Enabling SMBus access
Configuring DRAM
Enabling L1 cache memory
Clearing memory
F008h
Changing ROM BIOS to RAM BIOS
Storing key scan codes
Setting up TASK_1ms_TSC
F009h
Displaying message on navipanel (EC/KBC UPDATE,
BIOS UPDATE/DAMAGED)
Summary of Contents for M200 - Portege - Pentium M 1.5 GHz
Page 9: ...Portege M200 Maintenance Manual 960 457 ix Appendix H Key FD H 1 ...
Page 10: ...x Portege M200Maintenance Manual 960 457 ...
Page 11: ...Chapter 1 Hardware Overview ...
Page 12: ...1 Hardware Overview 1 ii Portege M200 Maintenance Manual 960 457 1 Hardware Overview ...
Page 33: ...Chapter 2 Troubleshooting Procedures ...
Page 34: ...2 Troubleshooting Procedures 2 ii Portege M200 Maintenance Manual 960 457 2 ...
Page 38: ...2 Troubleshooting Procedures 2 vi Portege M200 Maintenance Manual 960 457 ...
Page 97: ...Chapter 3 Tests and Diagnostics ...
Page 98: ...3 Tests and Diagnostics 3 ii Portege M200 Maintenance Manual 960 457 3 ...
Page 184: ...Chapter 4 Replacement Procedures ...
Page 185: ...4 Replacement Procedures 4 ii Portege M200 Maintenance Manual 960 457 4 ...
Page 189: ...4 Replacement Procedures 4 vi Portege M200 Maintenance Manual 960 457 ...
Page 258: ...Appendices ...
Page 259: ...Appendices App ii Portege M200 Maintenance Manual 960 457 ...
Page 265: ...Appendices App viii Portege M200 Maintenance Manual 960 457 ...
Page 271: ...Appendices Apx A Handling the LCD Module A 6 Portege M200 Maintenance Manual 960 457 ...
Page 279: ...Appendices Apx B Board Layout B 8 Portege M200 Maintenance Manual 960 457 ...
Page 309: ...Appendices Apx C Pin Assignment C 30 Portege M200 Maintenance Manual 960 457 ...
Page 319: ...Appendices Apx E Key Layout E 2 Portege M200 Maintenance Manual 960 457 ...
Page 321: ...Appendices Apx F BIOS KBC EC Update F 2 Portege M200 Maintenance Manual 960 457 ...
Page 323: ...Appendices Apx G Reliability G 2 Portege M200 Maintenance Manual 960 457 ...
Page 325: ...Appendices Apx H Key FD H 2 Portege M200 Maintenance Manual 960 457 ...