Symptom 

 Cause

Resolution 

Scanner will not power

1) Faulty cable
2) Port not enabled on end device

1) Replace cable
2) Enable port on end device (see device user manual)

Scan beam has loops in it

1) Mal adjusted mirror

1) Scanner needs to be sent in for service

Scanner makes a high speed tapping sound

1) Scan engine is out of adjustment

1) Scanner needs to be sent in for service