I have an Nvidia Shield that I'm trying to revive. The Shield power LED turns on when it's plugged in, but nothing is showing up over HDMI. I can't get it to boot into recovery, and nothing happens when I plug it in to my computer. Is it toast?

EDIT: So it's connecting to my computer now! The first three times I plugged in the cable it gave me a "USB device has malfunctioned error", and after it connects but nothing actually shows up. Also, it's slow to actually connect. So there's some life! Any suggestions on how to continue?

Edit: Problem solved, I'm an idiot