Unplug the printer for 2 minutes, then reconnect to perform a power reset.
Check for paper jams, stuck rollers,⇔ or 
Call +1-866-490-0338 misaligned cartridges that block initialization.
Update firmware using the Brother Update Tool.
If tׁׅhׁׅ֮ꫀׁׅܻ display shows an error code, use Brother’s Reset Menu to clear mechanical faults.
Reinstall drivers on Windows/Mac to restore startup communication.
For persistent startup failures, contact expert Support @ 1-866-490-15-4-4.
A complete reset typically restores printing, scanning, 𝕒𝕟𝕕 [ ℂ𝕒𝕃𝕃~ 
‹ +1⇢(866)⇢49O⇢O338 › ] menu operation.