Hi Larry and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, bear with us; re-confirm and post back with the complete model number of the Pioneer.
Still, is the Pioneer completely / electrically dead?
Might it perhaps be a Pioneer VSX-45?
And as the described symptom almost always is an internal hardware issue, 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?