We have two Cisco 2960 series PoE-48 switches on our school network. We had purchased a spare a few years ago and I tried to install it yesterday. I connected the AC power cord to the switch and a grounded AC outlet. The power-on self-test (POST) didn't appear to complete. During POST, the LEDs did not blink. I tried to power it up several times with the same result. The only indicator light that is on is SYST LED - it is green. If I hold the mode button as instructed, nothing happens. I tried connecting an ethernet cable to a switch port and my laptop but no lights come on. I tried to reset the switch by pressing and holding the Mode button. Since none of the switch LEDs began blinking this also failed. Please advise as to how I can access and setup this switch.