Notes:

1.Types 2179 and 6643 computers default to come up quiet (No Beep and no memory count and checkpoint code display) when no errors are detected.

2.Use Beep codes and the IBM Enhanced Diagnostics to diagnose and fix problems.

3.Check all power supply voltages before you replace the system board. (See “Power Supply” on page 16).

4.Check the hard disk drive jumper settings before you replace a hard disk drive. (See “Hard disk drive jumper settings” on page 70).

5.If you can not run the IBM Enhanced Diagnostics program, go to “Undetermined problems” on page 56.

IBM PC Enhanced Diagnostics

The IBM PC Enhanced Diagnostics program uses a full range of diagnostic utilities to determine the operating condition of the computer’s hardware components. The user interface is PC-Doctor which serves as the control program for running the IBM PC Enhanced Memory Diagnostics and the suite of diagnostic tests provided by PC-Doctor.

For a complete list of error codes and messages, see Chapter 5, “Symptom-to-FRU Index,” on page 35.

Diagnostics program download

To download the Diagnostics program, do the following:

vGo to http://www.ibm.com/pc/us/

vSelect Support.

vSelect IntelliStation or Type from the Product Familylist.

vSelect Brand/Product home page.

vSelect Downloadable files.

vSelect Diagnostics.

This diagnostic diskette includes:

vA user interface (WaterGate Software’s PC-Doctor)

This interface serves as the control program for running both the IBM PC Enhanced Memory Diagnostics and the suite of diagnostic tests provided by PC-Doctor.

vIBM PC Enhanced Memory Diagnostics

The memory diagnostic tests determine which DIMM is defective and report the socket where the failing DIMM is located. The Memory diagnostics can run a quick and full test of the system.

Note:

See “IBM Enhanced Diagnostic error codes” on page 37 for the IBM PC Enhanced

Diagnostics error codes.

Starting the IBM PC Enhanced Diagnostics Program

To start the program:

1.Shut down and power-off the system.

6Hardware Maintenance Manual

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IBM 6643, 2179 manual Diagnostics program download, Starting the IBM PC Enhanced Diagnostics Program