I don’t think there’s a setting you need to change. It sounds like there may be a bad electrical connection to the power input jack.
A couple of things to test:
- remove and reseat the power plug jack; don’t force it but do make sure it’s fully seated
- with the pedal powered up, plug in a USB cable; does it affect the power?
- next, and with the pedal still powered on, try with your midi cable
- if the pedal loses power with either of the cables, try gently pressing the power plug in or gently wiggling it to see if power comes back on.
If you continue to have problems, please contact email@example.com
Let us know how it turns out.