IBM 6644, 6645, 6646 manual Read the Following

servicing may have been rearranged, or the drive startup sequence has changed. Be extremely careful during write operations, such as copying, saving, or formatting. Data or programs can be overwritten if you select an incorrect drive. Ask the customer to back up any additional software from the hard disk drive before you reload the software.

How to Diagnose Combined FRUs: If an adapter or device consists of more than one FRU, any of the FRUs might cause an error code. Before replacing the device or adapter, remove the FRUs one by one to see if the symptoms change.

If a newly replaced FRU does not correct the problem: If you have reached this point of the check procedures and were instructed to replace a FRU but doing so did not correct the problem, reinstall the original FRU and go through “Start” again.

If you want to print a copy of a BIOS Setup Utility screen to an attached printer, press Print Screen key while the following screen is displayed.

READ THE FOLLOWING:

Human Error is a cause for concern when applied to check procedures. It exists in every first time set of analysis procedures. It is therefore essential for effective and time-efficient servicing that each stage of every procedure be verified. (For example: When a symptom is found, or when a symptom appears to have been cured; the preceding steps should be repeated for accuracy of analysis.)

001 - START

•To begin, note the following:

•Disable the setting of “Fast POST Mode” in BIOS Setup.

•To disable or reset the power-on password, see “Power-On Password” on page 8.

•Disconnect all external cables and devices from the system unit, except for the keyboard, mouse, and monitor.

•Power off the system unit (unplug the power cord) before moving it or when replacing FRUs.

32 IBM Desktop System HMM