Honda FourTrax Rancher TRX420TM1 2020 Owner's Manual page 26

Indicators & Displays
Display Check
Except TRX420TM1:
When the ignition switch is turned on, the multi-function display (1)
will temporarily show all the modes and digital segments and initial
message. So you can make sure the liquid crystal display is
functioning properly.
The displays are identified in the table on page 18 with the words:
Display Check.
If any part of these displays does not come on when it should, have
your dealer check for problems.
(1)
(1) multi-function display
16 Instruments & Controls