IBM 4QX User Manual

194

Hardware Maintenance Manual: IBM PC Server/Enterprise Racks

— Use the round ground-prong of the ac plug on ac-operated computers.

Grounding requirements

Electrical grounding of the PC Server Rack and computers is required for operator
safety and correct system function. Proper grounding of the electrical outlet can be
verified by a certified electrician.

Problem determination tips

Due to the variety of hardware and software combinations that can be encountered,
use the following information to assist you in problem determination. If possible,
have this information available when requesting assistance from Service Support and
Engineering functions.

•

Machine type and model

•

Processor or hard disk upgrades

•

Failure symptom

— Do diagnostics fail?

— What, when, where, single, or multiple systems?

— Is the failure repeatable?

— Has this configuration ever worked?

— If it has been working, what changes were made prior to it failing?

— Is this the original reported failure?

•

Reference/Diagnostics diskette version

— Type and version level

•

Hardware configuration

— Print (print screen) configuration currently in use

— BIOS level

•

Operating system software

— Type and version level

CAUTION:
Important:
To eliminate confusion, identical systems are considered

identical only if they:

Are the exact machine type and model

Have the same BIOS level

Have the same adapters/attachments in the same locations

Have the same address jumpers/terminators/cabling

Have the same software versions and levels

Have the same Reference/Diagnostics Diskette (version)

Have the same configuration options set in the system

Have the same setup for the operation system control files

Comparing the configuration and software set-up between "working and non-
working" systems will often lead to problem resolution.