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2.5 FLOPPY DISK DRIVE PROBLEM ISOLATION PROCEDURES
This section describes how to determine whether or not the floppy disk
drive is defective. Start with PROCEDURE 1 and continue with other
procedures as instructed. The procedures described in this section are:
PROCEDURE 1: Test and Diagnostics Program Loading Check
PROCEDURE 2: Message Check
PROCEDURE 3: Head Cleaning
PROCEDURE 4: FDD Test Execution
PROCEDURE 5: FDD Connector Check
PROCEDURE 6: New FDD Connection
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PROCEDURE 1
Test and Diagnostics Program Loading Check
1. Turn off the power.
2. Insert the diagnostics disk into the FDD.
3. Turn on the power.
4. If loading starts normally, go to PROCEDURE 3. (See section 3.2 to
determine if loading has started normally.)
5. If loading has not started normally, go to PROCEDURE 2.
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PROCEDURE 2
Message Check
1. When the power switch is turned on after the MS-DOS system disk is
inserted into the FDD, message (a), (b), or (c) shown below may
appear.
(a) *** FDD A is not installed ***
(b) Non-System disk or disk error Replace and press any key when
ready
(c) ** FDD load error or Bad system disk **
Insert system disk in drive
Press any key when ready .....
2. If message (a) is displayed, check that the A-B-PRT switch is set to
PRT. If it is not set to PRT, set it to PRT. If it is set to PRT, go