Galaxy RVR left motors not working

As stated, we got the RVR assembled and was testing it. Everything was working well then then all three left motors stopped working. After using a multimeter, there is no voltage going to the motors. The motor drivers do not look burnt. Help!

Update, left motors work in reverse but will only turn extremely slow in forward.

Please try swapping the left and right motor connections (just exchange the wiring of the two motors) and see if the problem changes to the right side having three motors not spinning. If that happens, it means the expansion board is faulty. Once we identify the issue, we will send you a replacement for the defective component.

We swapped them, at this point it looks like it is the board.

Do you need an address or how do we go about getting this shipped out?

Please contact service@sunfounder.com to provide your detailed address to get an expansion board and provide your original order number if possible.

E-mail sent, thank you.