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2.4 System Board Troubleshooting
2 Troubleshooting Procedures
TECRA M3 Maintenance Manual (960-507)
2-23
Table 2-5 Debug port LED boot mode status (4/7)
LED Status
Item
Contents/Message
04h
BIOS signature check (at Cold
Boot)
SMRAM initialization
Check of Wake Up factor
05h
Rewriting of SMRAM base and
storing CPU state map for BIOS
(Enabling SMI only by ASMI)
PIT test (at the Cold Boot) and initialization
Setting of test pattern for PIT#0 of CH0
Check whether the test pattern set can be read.
Initialization of PIT CH0 (Setting of timer interrupt
interval to 55ms)
Initialization of PIT CH2 (Setting of sound generator
frequency to 664Hz)
Test of PIT CH1 (Check whether a refresh signal is
working properly when refresh interval is set to 30ms.
HLT when the time is out.)
Test of PIT CH2 (Check whether the speaker gate is
working properly.)
Measuring of CPU clock
Enabling SMI except for auto-off function
Check of parameter block A
Control of input voltage over rating
Control of battery discharge current
Control of AC adapter over current rating
Division process of measuring IRT time
Setting for clock generator
06h
Initialization of a device which
needs initialization before
initialization of PCI bus
CPU initialization
Setting of CPU core frequency
Setting of Gsv high and low frequency
Check of Geyserville support
Setting of CPU clock to high
Storing memory configuration in
buffer
Reading EC version
Update of flash ROM type
07h
Evaluation of destination
(home/overseas) by DMI data
Summary of Contents for Tecra M3 Series
Page 1: ...Toshiba Personal Computer TECRA M3 Maintenance Manual TOSHIBA CORPORATION File Number 960 507 ...
Page 10: ...x TECRA M3 Maintenance Manual 960 507 ...
Page 11: ...Chapter 1 Hardware Overview ...
Page 12: ...1 Hardware Overview 1 ii TECRA M3 Maintenance Manual 960 507 ...
Page 27: ...1 2 System Unit Block Diagram 1 Hardware Overview TECRA M3 Maintenance Manual 960 507 1 13 ...
Page 53: ...1 13 Batteries 1 Hardware Overview TECRA M3 Maintenance Manual 960 507 1 39 ...
Page 54: ...Chapter 2 Troubleshooting Procedures ...
Page 55: ...2 Troubleshooting Procedures 2 ii TECRA M3 Maintenance Manual 960 507 ...
Page 58: ...2 Troubleshooting Procedures TECRA M3 Maintenance Manual 960 507 2 v ...
Page 60: ...2 Troubleshooting Procedures TECRA M3 Maintenance Manual 960 507 2 vii ...
Page 119: ...Chapter 3 Tests and Diagnostics ...
Page 120: ...3 Tests and Diagnostics 3 ii TECRA M3 Maintenance Manual 960 507 3 ...
Page 124: ...3 Tests and Diagnostics 3 vi TECRA M3 Maintenance Manual 960 507 ...
Page 235: ...Chapter 4 Replacement Procedures ...
Page 236: ...4 Replacement Procedures 4 ii TECRA M3 Maintenance Manual 960 507 ...
Page 359: ...Appendices ...
Page 360: ...Appendices App ii TECRA M3 Maintenance Manual 960 507 ...
Page 363: ...Appendices TECRA M3 Maintenance Manual 960 507 App v Appendix I Reliability I 1 ...
Page 367: ...Appendices TECRA M3 Maintenance Manual 960 507 App ix ...
Page 373: ...Appendices Appendix A Handling the LCD Module A 6 TECRA M3 Maintenance Manual 960 507 ...
Page 403: ...Appendices Appendix C Pin Assignments C 22 TECRA M3 Maintenance Manual 960 507 217 GND 218 NC ...
Page 427: ...Appendices Appendix E Key Layout E 2 TECRA M3 Maintenance Manual 960 507 ...
Page 429: ...Appendices Appendix F Wiring diagrams F 2 TECRA M3 Maintenance Manual 960 507 ...
Page 431: ...Appendices Appendix G BIOS rewrite procedures G 2 TECRA M3 Maintenance Manual 960 507 ...
Page 433: ...Appendices Appendix H EC KBC rewrite procedures H 2 TECRA M3 Maintenance Manual 960 507 ...
Page 435: ...Appendices Appendix I Reliability I 2 TECRA M3 Maintenance Manual 960 507 ...