this section describes how to replace the mainboard tray. you need a number 2 phillips screwdriver to perform this procedure:

    step 1 place the chassis so the rear panel faces you.

    step 2 hold the tray so that the tabs at the tray's lower corners are aligned with the ledge in the chassis opening. (see part 1 of figure 5-27.)

   

    step 3 slide the mainboard tray into the chassis until firm contact is made with the backplane. (see part 2 in figure 5-27.)

    step 4 push the levers at the lower corners of the mainboard inward. (see part 3 in figure 5-27.)

    step 5 tighten the two captive screws previously loosened in step 3 of the "removing the cisco 3660 mainboard tray" section on page 5-5. (see part 4 in figure 5-27.)

    step 6 reinstall the chassis on a rack or desktop.

    step 7 reconnect network interface cables.

    step 8 power on the router.

    if the router does not power on, see appendix a, "troubleshooting."