A Brother machine-error code at power-on points to an internal fault the printer hit while initializing. A full power reset clears transient ones; persistent codes need service.
Work through these in order; most people are fixed by the first two or three.
Turn the printer off, unplug for 1–2 minutes, then power on. Many one-off machine errors clear this way.
Open the covers and remove any paper scraps or packing material that could block initialization.
If the printer reaches Ready intermittently, update firmware via Brother Mobile Connect or the Firmware Update Tool.
If it persists, record the precise code — it tells a technician which component (fuser, scanner, motor) is at fault.
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