Hi Walt and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, is the unit new / straight from the box?
Then it would be indicative of an internal hardware issue with the Pioneer DEH-150MP.
Are you then considering a DIY (do-it-yourself) repair approach? If yes, do you have access to and familiar with a multi-meter and even a soldering iron?
Or perhaps more to your advantage, would you consider having it replaced by the seller/store?