Hey guys if your pump is dead more than likely it is the pcb so don't fret. If you have some soldering skills you can get a new pcb for your mcp355 pump. You will need to extend the wires though. I may do a tutorial if I can get a dead mcp355.If I do this thread will become a tutorial
You will also get better performance from this pcb to.
here is the link where to get the pcb
diyinhk | eBay