Checking Electrical Connections - IBM Personal Computer AT Manual To Operations

Checking Electrical Connections
1
Be sure your system unit's power is off.
2
Turn all externally attached devices' (printer,
TV, etc.) power off.
3
Disconnect all non-IBM devices from your
system unit, except the display.
4
Unplug your system unit's power cable from the
wall outlet.
Power
Cable
Testing Preparation 2-5