A51, M51e Series ThinkCentre Deskop PC Quick Reference Guide

instructions when it is appropriate for customers to replace those parts.
You must closely follow all instructions when performing such
replacements. Always make sure that the power is turned off and that
the product is unplugged from any power source before you attempt the
replacement. If you have any questions or concerns, contact the
Customer Support Center.
Although there are no moving parts in your computer after the power cord has
been disconnected, the following warnings are required for proper UL
certification.
Danger
Hazardous moving parts. Keep fingers and other body parts away.
Attention
Before replacing any CRUs, turn off the computer and wait three to
five minutes to let the computer cool before opening the cover.
Power cords and power adapters
Use only the power cords and power adapters supplied by the product
manufacturer.
Never wrap a power cord around the power adapter or other object. Doing so
can stress the cord in ways that can cause the cord to fray, crack or crimp. This
can present a safety hazard.
Always route power cords so that they will not be walked on, tripped over, or
pinched by objects.
Important safety information vii