New dishwasher, powers on, but only hums...

So, our old dishwasher suddenly stopped working. It would power on but would not run a cycle. It just hummed for a few minutes and then turned off. So, I got a new dishwasher. Hardwired it just like the old one. Hooked up the water line and line to the disposal. Now, the new one is doing the same thing. Sounds like maybe just the drain humming when pushing the start button on a cycle. Hums for 10 minutes and then shuts off. I'm completely stumped as to why this is happening. I'm starting to think that my old dishwasher actually works and it's something else entirely. This is so frustrating. Any help will be appreciated.