Technical information

Using the PC Card Director Program .............. 62
Using the Infrared Communication Feature ............ 72
Considerations for Communication ............... 74
Using the Mwave DSP Features .................. 75
Using the Audio Function .................... 78
Using the Telephony Function .................. 84
Chapter 4. Using Battery Power ................. 91
Operating Time with the Battery Pack ............... 92
Charging the Battery Pack ..................... 92
Charging with the AC Adapter .................. 93
Charging with the Travel Quick Charger ............ 94
Replacing the Battery Pack ..................... 95
Monitoring the Battery-Power Status ................ 96
Using the Battery-Power Status Indicator ........... 96
Using the Fuel-Gauge Program ................. 98
Preserving Battery-Pack Life .................... 103
Maximizing Battery-Powered Operation .............. 104
Using Advanced Power Management ............. 104
Decreasing LCD Brightness ................... 105
Using Power-Saving Modes ................... 106
Chapter 5. Protecting Your Computer ............. 109
Using Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Power-On Password . . . . . . . . . . . . . . . . . . . . . . . 110
Hard-Disk Password . . . . . . . . . . . . . . . . . . . . . . . 114
Supervisor Password . . . . . . . . . . . . . . . . . . . . . . . 118
Using the Hard-Disk and Power-On Passwords ........ 122
Using the Supervisor and Hard-Disk Passwords ....... 122
Using Several Hard Disk Drives with the Supervisor
Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Using the Personalization Utility Program ............. 125
Using Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Using the Lock on the Hard Disk Drive ............. 130
Using the Security Lock ..................... 131
Using the PC Card Lock ..................... 132
Chapter 6. Installing and Removing Options ......... 133
Installing and Removing PC Cards ................. 134
Inserting the PC Card ....................... 134
Removing the PC Card ...................... 136
Increasing Memory Capacity .................... 137
Installing an IC DRAM Card and DIMM ............ 138
Removing the IC DRAM Card and DIMM ........... 143
Replacing the Hard Disk Drive ................... 148
Installing Options in the Diskette Drive Compartment ...... 150
xii IBM ThinkPad 755CX User's Guide