Here, in this forum we have put some troubleshooting steps to fix brother printers not connecting to pc issues. If you are also facing the same issue then follow the given steps. It will definitely help you to get your printer back on the track.
1. Check your brother printer is turned on
2. Check your printer status
3. Disconnect and reconnect the printer again
4. Correct the printer settings on your pc
5. Update the printer with the latest drivers
6. Reset your printer to default settings