Step 10 Turn on all DC power supplies at the component level. Step 11 Check the power supplies and systems for power-on LED indications and airflow. Make this visual check inside the cabinet on each power supply and each system. When equipment installed in an system system rack fails because of overheating or power loss, try operating the equipment by itself. Step 2 Replace any defective fuse with a fuse of the correct rating.
Warning Never change fuses with live power present.
Lethal currents are present on and in the DC fuse panels. Caution Never use a larger fuse than what is specified for the individual locations. Step 3 Follow the power-on sequence of operations. Step 4 Verify that the proper LED power on indications are present and that airflow has resumed.