Do you have a multimeter device? For checking connections?
I am unfamiliar with your display, but the lower left hand corner yellow brake indicator may indicate your brake (motor cutoff) is engaged and therefore no power to the motor. It should not be Yellow. Somewhere your brake cutoff switch is engaged. Disconnect your bake HIGO plugs. If the light goes out, you have found the source of your problem. From there it should be an easy fix. It goes without saying, but I must say it, be careful operating your bike with brake motor cutoffs disengaged.
If that is not it:
Did you buy a kit?
Which Kit?
From whom?
Which motor?
Is your PAS cadence or Torque assist?
DO YOU HAVE A MULTIMETER?
When you say "can't get power to electric motor" what do you mean?
A: The throttle does not work.
B: When I ride and pedal the, there is no pedal assist.