Panasonic PT-MZ10K Operating Instructions Manual page 204

Note
f In following cases, turn the power of the projector off and on and perform the update from the beginning.
g When the update does not complete after 60 minutes or more have elapsed
g When the power of the projector or the computer has turned off due to power outage, etc., during the update
204 - ENGLISH
Chapter 5 Operations — Updating the firmware