HELP!

I had 10 of my 25 blades crash yesterday unexpectantly, and now they'll power on(the fan spins), but no lights come on at all. I've tried other gridseeds on the same USB/Pi , and they work without issue. I've tried cycling the power on both the 5V and 12V connections, but nothing seems to be working. Any suggestions? Whats the process for RMA?