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Running USB Register and Connection
Test: Boot from the Diagnostic Program Diskette and
select "Running USB Connect/Disconnect Test" from PC
DOS 7.0 Startup Menu. Follow the instructions on the
screen to execute the USB test. If the test fails, go to
“System Board Check” on page 27.
Utility Program Diskette
The Utility Program Diskette provides the three following
functions:
“Setting the Inverter ID”
“Setting the Thermal Sensor”
“Writing the VPD Data” on page 55
Setting the Inverter ID: There is an EEPROM in
the inverter, which store its supported LCD type and ID
code. If you replace the LCD with one of a different brand,
the ID information in the inverter EEPROM should be
updated.
Follow the steps below to set the LCD inverter ID:
1. Boot from the Utility Program Diskette.
2. Select Panel ID Diagnostic from PC DOS 7.0 Startup
Menu.
3. Follow the instructions on the screen to read the
current ID Code or to set a new inverter ID code.
Note: When you set a new inverter ID and the new
LCD is not yet enabled (to function), connect
an external CRT to see the program execution
process.
Attention: Make sure that the new ID code you
choose corresponds to the LCD brand and type. If
you write a wrong ID into the inverter, just reboot and
re-execute the program and input the correct ID code.
4. Restart the computer — the new LCD should work
normally.
Note: If the LCD has no display after changing the ID
code, make sure you write the correct ID code or
try reconnecting the LCD FPC cable connectors.
Setting the Thermal Sensor: The system is
equipped with sensors to protect against system over-
heating. By setting the system and processor thermal
thresholds, the system can turn on the cooling Fan ASM or
shut down automatically when the temperature reaches the
defined threshold parameters.
System experiencing frequent auto sensor shutdown may
need to reset the thermal sensor threshold.
Follow the steps below to set the thermal threshold:
54 ThinkPad i Series 1400 HMM