The E-5 error code relates to a communication error between the computer and the resistance motor. In most cases, this is caused by the cable that plugs into the back of the computer not being properly inserted into its connection point or by a bent pin on that connection.
Please unplug the cable that plugs into the back of the computer and check that none of the pins are bent. If a pin is bent then gently push the pin back into a straight position. Once the pins have been checked re-connect the cable and firmly push it into position.
This will rectify the problem but in the unlikely event that it does not please let us know by using the contact form in this helpdesk or by email to firstname.lastname@example.org and we'll send you a replacement computer and cable which will resolve the issue.