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This is the entry point for all check procedures. The check procedures use failure symptoms, Power-On Self Test (POST) error codes, or beeps to help determine the defective field replaceable unit (FRU). Follow the suggested check procedures or use the diagnostics diskette to determine the problem FRU.

IMPORTANT: Replace FRUs ONLY when it is determined that the error is not a result of software, loose contacts, or dirty component surfaces. Any FRU change should be verified by running a complete test (Diagnostics - All Tests in PC-Doctor diagnostics program).

This book should be used in conjunction with the 2169 diagnostics diskette. This diskette should be used ONLY with Machine Type 2169. Do not use this diskette on other models. See page 71 for information on how to download this diskette.

POST error codes and error messages are displayed on the screen after the IBM logo. A beep will precede each error code or message. Please refer to “Index of Symptoms, Messages, Error Codes, or Beeps” on page 74 for additional help.

All voltages in the check procedures are positive unless otherwise indicated. Use frame ground for all voltage checks unless otherwise specified.

IMPORTANT: There is a voltage selector on the rear panel of the machine. Use a flat-head screwdriver to turn the voltage selector to the voltage setting for the area in which you will be using the system.

NOTE: If the check procedures instruct you to replace a FRU and the error message persists, an option adapter card might be causing the failure. Remove all option adapter cards, one at a time, until the error changes or the problem is no longer apparent. The problem may be in the last card that you removed or something associated with it.

Product Recovery Program menu

Type 2169 has recovery and diagnostics programs on a separate hard drive partition. The recovery CD and Enhanced Diagnostics diskette are not shipped with the machine or the HMM. To download diagnostics tests or to order a recovery CD, see “Enhanced Diagnostics download” or diskette.

IBM PC Enhanced Diagnostics

The IBM PC Enhanced Diagnostics programs use a full

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IBM 2169 manual Product Recovery Program menu, IBM PC Enhanced Diagnostics, Start