Rachio not booting - Resistor shorted?

I am super frustrated today. was getting ready to install my newly bought Rachio3 from ebay. I crossed across the border from Canada to US to pick it up. Came back home and it turns out it is not bootable.
I realize its a gamble i took when i bought on ebay, but my only option now is to try to repair the unit.

Anyone knows what MV15 is? I see some spark when i plug in the power.