Blue Triangle MK3i ver 16.25

Mk3i updated to 16.25,will not power on pass the blue triangle. Can connect via usb to garmin express and sync’s ok.

Is there a button press procedure for this watch, the mk2i was hold light button up to 15 sec to power off then hold light button press hold Start and then back button until first beep release start and wait to release back button on second beep.