Help troubleshooting cab

Hi - not sure what information is needed to help troubleshoot my DDR extreme cab. It hasn’t been used since the summer of 2020. It passes the drive check, sum check, and boot check without any issues. It gets stuck on the “now loading” screen at 114. Any thoughts on what the issue is?

Unrelated to this issue, I know I need to new sensors for the second player pad. Where’s the best place to buy parts?

Thanks so much for your help!!