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| Troubleshooting |
| Symptom Charts/Peripherals - 28 | |
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| 1 | Verify that System is 7.5.2 or later. |
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I/O devices are | |||||
unrecognized or | 2 | Check cables | |||
garbage is | 3 | Verify that SCSI device is correctly terminated. | |||
transmitted or | 4 | Verify that SCSI select switch setting on external device is | |||
received | 5 | unique. | |||
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| Test device with | ||
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| 6 | Replace logic board. | |
Note: When replacing the logic board, check that the serial port EMI clip is attached to the bottom of the CPU stiffener. If it is missing, replace the stiffener. On international units, also replace the stiffener if the modem EMI clip is missing. The “CPU Stiffener” topic in Take Apart helps you locate and identify the two EMI clips.
Note: Perform the battery contact alignment procedure when you replace a logic board. (See Additional Procedures, “Align Battery Contacts.”)
