HP 2070N - Manual (Page 49)

Control panel
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3
Table 1: LED indications while pressing Go button
Make a note of the indication and report the error status to your dealer or a Brother authorized service
representative by referring to the above table.
Note
Make sure that the front cover is fully closed before you report a service call.
* 1 If this error occurs, turn the power switch off, wait a few seconds, and then turn it on again.
Leave the printer for 10 minutes with the power on. If the error occurs again, consult your dealer or Brother
authorized service representative.
LEDs
fuser unit
failure* 1
Laser unit
failure
Main motor
failure
Main PCB
failure
Toner
Drum
Paper
Ready