Three errors on a design spot 250

I had my wife buy this unit down in Florida and it had three error messages:
05, 06 & 07.

Each error could have multiple causes. EG, error coder 05

"This message will appear after a fixture reset if the color wheel’s magneticindexing
circuit malfunctions (sensor failed or magnet is missing) or there is a stepper motor
failure (defective motor or a defective motor IC drive on the main PCB)."

How do I isolate what the cause is for each?

Thanks for your help.