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2.
Replace the HDC. (Refer to part 4.11.)
3.
Connect the new HDC to the system PCB and HDD, then other
connectors too.
4.
If normal operation is restored, the previous HDC was defective.
Assemble the system.
5.
If normal operation is not restored, HDD is probably defective. Go
to PROCEDURE 7.
Page 2-30
PROCEDURE 7
New HDD Connection
1.
Turn the POWER switch off.
2.
Remove the HDD. (Refer to part 4.12.)
3.
Connect the new HDD to the HDC, then other connectors too.
4.
If normal operation is restored, the previous HDD was defective.
Assemble the system.
5.
If normal operation is not restored, system PCB is probably
defective. System PCB is probably defective. Refer to part 2.4.
MODEL:T1200H/HB
Page 2-31
2.7 KEYBOARD ISOLATION PROCEDURES
This section describes how to determine whether the keyboard is
defective or not. The procedures below are outlined in the following
pages. They should be performed in the order indicated.
PROCEDURE 1: Input Check
PROCEDURE 2: Keyboard Test Execution
PROCEDURE 3: Connector Check
PROCEDURE 4: New Keyboard Connection
Page 2-32
PROCEDURE 1
Input Check
1.
Load either the diagnostics disk or the MS-DOS system disk.
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