Datamax H Class Operator's Manual page 112

Step Displayed
Message
3. H4210.173
7/01/2005
4. READY
Notes: If the procedure above fails to put the printer into boot mode, use this method:
(A) Turn OFF the power switch.
(B) Press and hold the FEED and CANCEL Keys (the middle and right-hand keys on
the front panel).
(C) Turn ON the printer. After SEND MESSAGE is displayed, release the buttons and
retry the update as described above.
Operator Action
104
Comments
The printer has automatically reset.
The new application is now running.
Note: If 'Uncalibrated' is displayed,
the printer must be calibrated.