I recently (1 week ago) bought a 9010 from J&L Aquatics in Vancouver. Seemed to be working well. I shut off my power bar to do some tank maintenance. Turned everything back on and my skimmer didn't do a thing. I tried different plug ins, nothing. I took it out of the sump and when i plug it in there is just a faint humm and it doesn't do a thing. What should i do????