IBM MICRO TOWER 2169 - Manual (Page 143)

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General Guidelines
The purpose of this Safety Inspection Guide is to help you
identify possible unsafe conditions on machines that are being
inspected for a Maintenance Agreement. Each machine has
necessary functions items installed to provide the operators and
service personnel with an acceptable level of safety. This guide
lists only these items. Good judgment should be used to identify
possible safety conditions not covered by this Safety Inspection
Guide.
If any unsafe conditions are present, you must find out how
serious the hazard is and if you can continue before you correct
the hazard.
All current IBM service supplements outlining feature/model
changes, along with the machine history, should be reviewed.
Check the following items:
q Damaged, missing, or changed parts, especially in the
area of the On/Off switch and the power supply.
q Damaged, missing, or changed covers.
q Possible safety exposure from any non-IBM attachments.