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2.4 System Board Troubleshooting
2 Troubleshooting Procedures
TECRA M1 Maintenance Manual (960 -436)
2-21
Table 2-3 Printer port LED boot mode status (2/8)
LED Status
Test item
Message
Storing key scan code
Setting of TASK_1ms_TSC
B5H
Display initialization
FAN control
Enabling system speaker
Disabling mute
Sound controller initialization (for
beep)
Setting volume to max
Message display
CEC/KBC UPDATE/DAMAGED, BIOS
UPDATE/DAMAGED
Disabling USB
Sound beep
Key input
Waiting for key input
FDC reset
Setting of parameter for 2HD (1.44MB), transmission rate
Reading first sector
Setting of parameter for 2DD (720KB), transmission rate
Search of CHGBIOSA.EXE from route directory
Calculation of directory start head, sector
Reading contents of route directory by one sector
Search of entry for "CHGBIOSA.EXE"/
"CHGFIRMA.EXE", from the sector read
Reading of EXE header of "CHGBIOSA.EXE"/
"CHGFIRMA.EXE" key input when an error occurred
B6H
Reading
CHGBIOSA.EXE/CHGFIRMA.EXE
Execute "CHGBIOSA.EXE"/"CHGFIRMA.EXE"
Prohibition of cache
Prohibition of cache
B3H
Initialization of special register
00H
PIT CH1 initialization
(Setting refresh interval to 30ms)
Check of DRAM type and size
(at Cold Boot)
(HLT when the DRAM type is 0)
01H
SM-RAM stack area test
(HLT when the stack area can not be used .)
Cache configuration
Enabling L1 cache
CMOS access test
(at Cold Boot) (HLT when an error is detected.)
Battery level check of CMOS
02H
CMOS checksum check
Summary of Contents for Tecra M1
Page 1: ...Toshiba Personal Computer TECRA M1 Maintenance Manual TOSHIBA CORPORATION File Number 960 436 ...
Page 6: ...vi TECRA M1 Maintenance Manual 960 436 ...
Page 10: ...x TECRA M1 Maintenance Manual 960 436 3 29 SETUP 3 78 ...
Page 13: ...TECRA M1 Maintenance Manual 960 436 xiii ...
Page 14: ...Chapter 1 Hardware Overview ...
Page 15: ...1 Hardware Overview 1 ii TECRA M1 Maintenance Manual 960 436 ...
Page 32: ...1 2 System Unit Block Diagram 1 Hardware Overview TECRA M1 Maintenance Manual 960 436 1 15 ...
Page 54: ...Chapter 2 Troubleshooting Procedures ...
Page 55: ...2 Troubleshooting Procedures 2 ii TECRA M1 Maintenance Manual 960 436 ...
Page 58: ...2 Troubleshooting Procedures TECRA M1 Maintenance Manual 960 436 2 v ...
Page 60: ...2 Troubleshooting Procedures TECRA M1 Maintenance Manual 960 436 2 vii ...
Page 123: ...Chapter 3 Tests and Diagnostics ...
Page 124: ...3 Tests and Diagnostics 3 ii TECRA M1 Maintenance Manual 960 436 ...
Page 224: ...3 Tests and Diagnostics 3 29 SETUP 3 96 TECRA M1 Maintenance Manual 960 436 ...
Page 225: ...Chapter 4 Replacement Procedures ...
Page 226: ...4 Replacement Procedures 4 ii TECRA M1 Maintenance Manual 960 436 ...
Page 309: ......
Page 327: ...4 Replacement Procedure 4 25 Fluorescent Lamp 4 90 TECRA M1 Maintenance Manual 960 436 ...
Page 330: ...4 25 Fluorescent Lamp 4 Replacement Procedure TECRA M1 Maintenance Manual 960 436 4 93 ...
Page 349: ...Appendices ...
Page 350: ...Appendices App ii ...
Page 362: ...Appendices Appendix A Handling the LCD Module A 6 TECRA M1 Maintenance Manual 960 436 ...
Page 368: ...Appendices Appendix B Board Layout B 6 TECRA M1 Maintenance Manual 960 436 F VR3000 Volume ...
Page 395: ...Appendices Apx C Pin Assignments C 24 TECRA M1 Maintenance Manual 960 436 123 NC 124 B3V ...
Page 401: ...Appendices Apx C Pin Assignments C 30 TECRA M1 Maintenance Manual 960 436 41 FL P5V ...
Page 408: ...Appendix C Pin Assignments Appendices TECRA M1 Maintenance Manual 960 436 C 37 ...
Page 418: ...Appendices Appendix E Key Layout E 2 TECRA M1 Maintenance Manual 960 436 ...
Page 422: ...Appendices Appendix G BIOS Rewrite Procedures G 2 TECRA M1 Maintenance Manual 960 436 ...
Page 424: ...Appendices Appendix H EC KBC Rewrite Procedures H 2 TECRA M1 Maintenance Manual 960 436 ...
Page 426: ...Appendices Appendix I Reliability I 2 TECRA M1 Maintenance Manual 960 436 ...