I've tried plugging my Cisco 1140 series router into an ethernet port in both my mom's house (where it formerly worked) and here in college, in order to power it with PoE. However, the light never comes on, no matter which cable I use or which port. I've also tried pressing and holding the mode button, to no avail.
I know the ethernet ports should work, as I've been using them with my PC with no problems for as long as I can remember.
Why won't it turn on?
