step 1 identify the failed power supply by checking the power supply leds (ps1 and ps2) on the router's front panel. (for an explanation of power supply leds, see table a-3.)
step 2 facing the rear panel, identify the failed power supply by checking the bay (ps1 or ps2) that it is installed in, and checking that the led on the power supply is orange or off. (see figure 6-1 for the location of the power supply led.)
step 3 turn off power to the failed power supply and unplug the power cable.
always unplug the power cable before loosening the captive screws. if the power cable is still plugged in, it prevents the captive screws from being loosened adequately to remove the power supply.
step 4 loosen the two captive screws holding the power supply in the chassis bay, using the phillips or flat-blade screwdriver. (see figure 6-1.)
step 5 slide the power supply out of the bay. (see figure 6-1.)
step 6 install a replacement power supply as described in the "installing a power supply" section that follows. if you are not planning to install a power supply at this time, refer to the "power supply filler panel" section on page 6-3.
1.if your router is running with two power supplies installed and one is found to be defective, cisco recommends that you do one of the following:
- leave the defective power supply in the router until the replacement unit arrives
- remove the defective power supply and install a filler panel
2.either of these will ensure that correct airflow is maintained in the router.