Cleaning the Focus 40 Braille Display and running diagnostics-repair and take care of it – YouTube
https://www.youtube.com/watch?v=2IKcq6veLx4
Educational Services for Blind/Low Vision -Specialized Instruction in Technology/Braille/Nemeth and other Blind skills
https://www.youtube.com/watch?v=2IKcq6veLx4
https://www.youtube.com/watch?v=gIlPb33w9HY
https://www.youtube.com/watch?v=X2emrX8fFy0
https://www.youtube.com/watch?v=TfBCn-hQTJc
https://www.youtube.com/watch?v=zicOefubeIc
https://www.youtube.com/watch?v=md0osGVpb6I
https://www.youtube.com/watch?v=5ymxWrUCtEE
https://www.youtube.com/watch?v=TBcBQ_4KYwo
https://www.youtube.com/watch?v=OHTLrVqHgzQ
https://www.youtube.com/watch?v=MwXmmOcFTZ8