IBM ThinkPad 390 Hardware Maintenance Manual

Contents
Introduction . . . . . . . . . . . . . . . . . . . 1
Important Service Information ........... 1
How to Use Error Messages .......... 2
How to Read POST Error Messages ...... 2
Drive and Diskette Compatibility Matrix ....... 3
Safety Notices (Multi-lingual Translations) ..... 4
Safety Information . . . . . . . . . . . . . . . . 11
General Safety . . . . . . . . . . . . . . . . 11
Electrical Safety . . . . . . . . . . . . . . . . 12
Safety Inspection Guide ............ 13
Handling Electrostatic Discharge-Sensitive Devices 15
Grounding Requirements . . . . . . . . . . . . 15
Laser Compliance Statement ........... 16
ThinkPad 390/i Series 1700 Hardware Maintenance
Manual . . . . . . . . . . . . . . . . . . . . . 19
Read This First .................. 19
What to Do First ................ 20
How to Disable the Password ......... 21
Product Overview . . . . . . . . . . . . . . . . . 21
Fn Key Combinations ............. 22
Status Indicators . . . . . . . . . . . . . . . . 23
Checkout Guide . . . . . . . . . . . . . . . . . 24
Audio Checkout . . . . . . . . . . . . . . . . 25
Diskette Drive Checkout ............ 25
CD-ROM ASM Checkout ............ 26
Fan ASM Checkout .............. 27
Keyboard and Auxiliary Input Device Checkout . 27
Memory Checkout . . . . . . . . . . . . . . . 27
Modem Board Checkout ............ 28
Power System Checkout ............ 28
TrackPoint Checkout . . . . . . . . . . . . . . 30
Power Management Features ......... 31
Symptom-to-FRU Index . . . . . . . . . . . . . . 33
Numeric Error Codes .............. 34
Error Messages . . . . . . . . . . . . . . . . 36
No Beep Symptoms .............. 37
LCD-Related Symptoms . . . . . . . . . . . . 37
Keyboard-Related Symptoms . . . . . . . . . . 38
Indicator-Related Symptoms . . . . . . . . . . 38
Power-Related Symptoms . . . . . . . . . . . 38
PC Card (PCMCIA)-Related Symptoms ..... 38
Speaker-Related Symptoms . . . . . . . . . . 38
Power Management-Related Symptoms ..... 39
Peripheral-Device-Related Symptom . . . . . . 39
Intermittent Problems . . . . . . . . . . . . . 40
Undetermined Problems . . . . . . . . . . . . 40
CE Utility Program Diskette ............ 41
Setting the LCD Panel ID ........... 41
Setting the Thermal Sensor .......... 41
Contents v

IBM ThinkPad 390 Specifications

General

Brand	IBM
Model	ThinkPad 390
Category	Laptop
Language	English