Symbols And Conventions; Technician Notes - Compaq EX Series Maintenance & Service Manual

preface
A T
BOUT HIS
This Maintenance & Service Guide is a troubleshooting and repair guide that can be used
for reference when servicing the Compaq Deskpro EX Series of Personal Computers
Minitower Model. Only authorized technicians trained by Compaq should attempt to
repair this equipment.
Compaq Computer Corporation reserves the right to make changes to the these models
without notice.

Symbols and Conventions

The following text and symbols mark special messages throughout this guide:
WARNING: Text set off in this manner indicates that failure to follow directions in the warning could
!
result in bodily harm or loss of life.
CAUTION: Text set off in this manner indicates that failure to follow directions could result in
damage to equipment or loss of data.
Text set off in this manner presents commentary, sidelights, clarifying information, or
specific instructions.

Technician Notes

WARNING: Only authorized technicians trained by Compaq should attempt to repair this equipment.
!
All troubleshooting and repair procedures are detailed to allow only subassembly/module level repair.
Because of the complexity of the individual boards and subassemblies, no one should attempt to make
repairs at the component level or to make modifications to any printed wiring board. Improper repairs
can create a safety hazard. Any indications of component replacement or printed wiring board
modifications may void any warranty.
WARNING: To reduce the risk of electric shock or damage to the equipment:
!
CAUTION: To properly ventilate your system, you must provide at least 3 inches (7.6 cm) of
clearance at the front and back of the computer.
G
UIDE
Do not disable the power grounding plug. The grounding plug is an important safety feature.
Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all
times.
Disconnect the power from the computer by unplugging the power cord either from the
electrical outlet or the computer.
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers vii