HP m232dw displays 79 amber lights flashing.

Redundant power failure. According to inquiry Pratt & Whitney's instruction manual, HP m232dw shows that 79 amber light flashing is a redundant power failure, so you can turn it off, unplug the power cord and wait for 10 minutes before restarting. HP M232dw is an all-in-one machine integrating printing, copying and scanning, which can not only complete printing operation, but also support copying and scanning functions.