# Replacing a Power Input Module

To replace a power input module (PIM):

1. Power down the router. See Powering Down.
2. Remove the clear plastic guard covering the PIM.

   | Warning: Be sure the power source is turned off and all power switches are in the OFF position.

3. Disconnect the power cables and grounding cables. See Figure 48.
4. With an appropriate screwdriver (using a No. 2 Phillips screwdriver, if necessary), loosen the screws located at the corners of the PIM.
5. Using two hands, pull the PIM out of the chassis.
6. Install the new PIM and tighten the screws.

   | Caution: Do not overtighten the screws.

7. Reconnect the power cables and grounding cables. See Cabling the Router for Power
8. Replace the clear plastic guard.
9. Power up the router. See Powering Up ERX Routers.

Figure 48: Power Input Module for ERX14xx Models