Depending on the length of time the power was interrupted, your system may require GPS initialization.

If initialization is not necessary, the system proceeds directly to the Startup Confirmation screen.
If the system fails to locate a sufficient number of satellites to locate your position within 10 minutes, the following screen is displayed.

If you are experiencing GPS reception problems:
Customer Service Information
Honda dealership personnel are trained professionals. They should be able to
answer all your questions.
If you encounter a problem that your dealership does not solve to your satisfaction,
please ...
Front Brake Caliper Overhaul
caution
Frequent inhalation of brake pad dust, regardless of material composition,
could be hazardous to your health.
Avoid breathing dust particles.
...
Brake Booster Replacement
Remove the air cleaner cover and the air cleaner case.
Remove the master cylinder.
Disconnect the brake booster vacuum hose (A) from the brake booster.
...