IBM ThinkPad R30, Hardware Maintenance Manual

Page: 31 / 235

Note: If LCD cannot display after change ID code, make
sure you write the correct ID code, or try reseating
the LCD coaxtial cable connectors.
Thermal Sensor
The system is equipped with sensors to protect against
system overheating. By setting system and processor
thermal thresholds, the system can turn on the cooling fan
or shut down automatically when temperatures reach the
defined threshold parameters.
System experiencing frequent auto sensor shutdown may
need to reset the thermal sensor threshold and execute
the fan test to ensure the normal operation of the cooling
fan.
Follow the steps below to set thermal threshold:
1. Install the ThinkPad CE Utility Diskette and restart the
computer.
2. Select 2. Thermal Sensor Utility from the main menu.
3. Select 1. Read Thermal Setting to view the original
setting or 2. Set Default Thermal Setting to restore the
default setting.
UUID
The Universal Unique Identifier (UUID) is a 128–bit number
uniquely assigned to your computer at production and
stored in the EEPROM of your 24RF08. The algorithm that
generates the unique number is designed to provide
unique IDs until the year A.D. 3400. Consequently, no tow
computers in the world will have the same number.
When you replace the system board, you must set the
UUID on the new system board as follows:
1. Install the ThinkPad CE Utility Diskette and restart the
computer.
2. Select 3. UUID Data Utility from the main menu then
make a selection to read or create the UUID data.
A new UUID is created and written. If a valid UUID already
exists, it is not overwritten.
MT 2656, 2657, 2676
25