2.4 System Board Troubleshooting
2 Troubleshooting Procedures
2-22
PORTEGE M300 Maintenance Manual (960-504)
5.
Execute GETDPORT.COM in the text menu in CPU REAL mode. (Insert the FD for
starting D port into FDD and input “FD starting drive:>dport”.)
The D port status is displayed in the following form;
6.
When the D port status is FFFFh (normal status), go to Procedure 3.
7.
When the D port status falls into any status in Table 2-4, execute Check 1.
Table 2-4 Debug port error status (1/7)
D port status
Inspection items
Details
F000h
Clear of software reset bit
Permission of A20 line
Initialization of special register and M1535
PIT CH0 initialization (for HOLD_ON)
BIOS rewrite factor flag initialization
Check sum check
(FEFC0000h-FEFF7FFFh)
Transition to protected mode
Boot block checksum
Program halt when check sum error
Checksum other than boot block
F001h
EC/KBC rewrite check
BIOS rewrite process when rewrite is
requested
KBC initialization sequence
Send KB Enables command.
Check F12 key
F002h
Initialization of security controller
F003h
-F005h
BIOS rewrite request check
Check sum error except BootBlock
when “F12 rewrite” is requested
F006h
BIOS signature check
F007h
BIOS rewrite process
Transition to System BIOS IRT
BIOS rewrite
Initialization of H/W of unique function
for each model
Initialization of I/O space for GPIO
Permission of BIOS writing
Serial interrupt control
Содержание Portege M300
Страница 1: ...Toshiba Personal Computer PORTEGE M300 Maintenance Manual TOSHIBA CORPORATION File Number 960 504 ...
Страница 10: ...x PORTEGE M300 Maintenance Manual 960 504 ...
Страница 43: ...Chapter 2 Troubleshooting Procedures ...
Страница 44: ...2 Troubleshooting Procedures 2 ii PORTEGE M300 Maintenance Manual 960 504 ...
Страница 49: ...2 Troubleshooting Procedures PORTEGE M300 Maintenance Manual 960 504 2 vii ...
Страница 106: ...PORTEGE M300 Maintenance Manual 960 504 3 i Chapter 3 Tests and Diagnostics ...
Страница 107: ...3 ii PORTEGE M300 Maintenance Manual 960 504 ...
Страница 110: ...PORTEGE M300 Maintenance Manual 960 504 3 v 3 32 1 Function Description 3 94 3 32 2 Accessing the SETUP Program 3 96 ...
Страница 112: ...PORTEGE M300 Maintenance Manual 960 504 3 vii ...
Страница 118: ...3 2 Executing the Diagnostic Test 3 Tests and Diagnostics 3 6 PORTEGE M300 Maintenance Manual 960 504 ...
Страница 226: ...3 32 SETUP 3 Tests and Diagnostics 3 110 PORTEGE M300 Maintenance Manual 960 504 ...
Страница 227: ...Chapter 4 Replacement Procedures ...
Страница 228: ...4 Replacement Procedures 4 ii PORTEGE M300 Maintenance Manual 960 504 ...
Страница 232: ...4 Replacement Procedures 4 vi PORTEGE M300 Maintenance Manual 960 504 ...
Страница 313: ...Appendices ...
Страница 314: ...Appendices App ii PORTEGE M300 Maintenance Manual 960 504 ...
Страница 320: ...Appendices App viii PORTEGE M300 Maintenance Manual 960 504 ...
Страница 326: ...Appendix A Handling the LCD Module A 6 PORTEGE M300 Maintenance Manual 960 504 ...
Страница 332: ...B 3 HDD FPC View FNCHD Appendix B Board Layout B 6 PORTEGE M300 Maintenance Manual 960 504 ...
Страница 358: ...C 32 CN9610 HDD I F connector 44 PIN Appendix C Pin Assignment C 26 PORTEGE M300 Maintenance Manual 960 504 ...
Страница 368: ...Appendix E Key Layout E 2 PORTEGE M300 Maintenance Manual 960 504 ...
Страница 370: ...Appendix E Key Layout E 2 PORTEGE M300 Maintenance Manual 960 504 ...
Страница 374: ...Appendix G BIOS Rewrite Procedures G 2 PORTEGE M300 Maintenance Manual 960 504 ...
Страница 376: ...Appendix G BIOS Rewrite Procedures G 2 PORTEGE M300 Maintenance Manual 960 504 ...
Страница 378: ...Appendix H EC KBC Rewrite Procedures H 2 PORTEGE M300 Maintenance Manual 960 504 ...
Страница 380: ...Appendix I Reliability I 2 PORTEGE M300 Maintenance Manual 960 504 ...