Check that the bin stat has not been broken and has no ice sitting on it. If the bin stat is clean and doesn't appear to be broken, you can attempt to jump out the bin stat and see if the machine comes on.
If the machine comes on, replace the bin stat. If the machine does not come on and you have shut the machine off and back on, then you will need to call for service.
The check valve is a common issue with the Hoshi line-up. If you know where this is, take it apart, clean it, and re-install it.
Answers & Comments
Hoshizaki KM-900MAH no power to the circuit board. What is the secondary voltage of the transformer that feeds the board?
Check for power supplied to unit.
Check that the bin stat has not been broken and has no ice sitting on it. If the bin stat is clean and doesn't appear to be broken, you can attempt to jump out the bin stat and see if the machine comes on.
If the machine comes on, replace the bin stat. If the machine does not come on and you have shut the machine off and back on, then you will need to call for service.
The check valve is a common issue with the Hoshi line-up. If you know where this is, take it apart, clean it, and re-install it.