2.1 Troubleshooting
Chapter 2 describes how to determine if a Field Replaceable Unit (FRU) in the T1900/
T1900C is causing the computer to malfunction. FRUs covered include the:
1. Upper and Lower System Boards
2. Floppy Disk Drive
3. Hard Disk Drive
4. Keyboard
5. Display
The Diagnostics Disk operations are described in Chapter 3 and detailed replacement
procedures are given in Chapter 4.
The following tools are necessary for implementing the troubleshooting procedures:
1. T1900/T1900C Diagnostics Disk
2. Phillips head screwdriver (2 mm)
3. Toshiba MS-DOS system disk(s)
4. 2DD or 2HD formatted work disk for floppy disk drive testing
5. Cleaning kit for floppy disk drive troubleshooting
6. Printer port LED
7. RS-232-C wraparound connector
8. Printer wraparound connector
9. Multimeter
10. External 5.25-inch floppy disk drive
11. External CRT
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