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2.4 System board Troubleshooting 2 Troubleshooting
Procedure 2 Debug Port Check
Check the D port status by a debug port test. The tool for debug port test is shown below.
Figure 2-2 A set of tool for debug port test
The test procedures are follows:
1. Connect the debug test cable to the connector CN3400 of the system board. For
disassembling to connect the test cable, refer to Chapter 4.
2. Connect the debug port test cable and RS-232C cross-cable to the test board.
3. Connect the RS-232C cross-cable to the PC that displays the results.
PC that displays
the test results
Test board
CN3400 System board
RS-232C cross-cable Debug port test cable
4. Boot the computer in MS-DOS mode.
PORTEGE R200 Maintenance Manual (960-519) [CONFIDENTIAL] 2-19