Toshiba T6400, Maintenance Manual

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2-6
Is an
Error Message
displayed?
Perform System Board
Troubleshooting Procedures in
Section 2.4.
YES
NO NO
Perform Display Troubleshooting
Procedures in Section 2.8.
NO
If the
Password =
prompt is
displayed, type in the user password
and press Enter.
YES
YES
YES
NO
YES
NO
2.2 Troubleshooting Flowchart
Use the flowchart in Figure 2-1 as a guide to determine which FRU troubleshooting procedures to
execute. Before performing the flowchart procedures, perform the following:
❑
Disconnect all optional equipment from the T6400.
❑
Remove any diskette in the FDD.
NOTE: If you forget the password and cannot start up the computer, connect the printer
port wraparound board (F31PRT), then turn the POWER switch on. The computer will skip
the password function.
Figure 2-1 Troubleshooting flowchart
Is the
MEMORY TEST XXXXKB
message displayed
?
Perform Power Supply Board
Troubleshooting Procedures in
Section 2.3.
Perform System Board
Troubleshooting Procedures in
Section 2.4.
Does the
POWER INDICATOR
illuminate?
Does the
MEMORY TEST XXXKB
message proceed from
0KB to 640KB?
Is Toshiba
MS-DOS being
loaded?
Perform Floppy Disk Drive
Troubleshooting Procedures in
Section 2.5.
1
NO
Turn the Power Switch ON
and wait 5 seconds.
START
Insert the Toshiba MS-DOS diskette
into the FDD.