For more info, you need to post the Model Number of the Pioneer UnitShould be on the Face Plate, Unit & / or Owners Manual
Typically the Face Plate is the problemIf the Unit worked fine & there was no loss of Memory (stations, time, etc.) & the Unit slowly contracted these problems, you can try:Clean the Contacts on the Face Plate & the Front of the Unit with Alcohol & Cue Tip, making sure it is dry prior to inserting Face Plate
If the problem persists, it would be less expensive to have Pioneer check the complete Unit, rather than just sending Face PlateThey have a Repair price that covers anything for one price
Remember, Face Plate is typically the most expensive part on most units & sometimes it is cheaper to find another Unit On-Line, E-Bay, etc.
Thank you for the added info..............
On this unit it can be more Internal than Face Plate, as there is not that much circuitry in the Face Plate like other models
DIY repair is same, but if the unit proves to still have a problem, you may want to consider purchase of used unit, as repair would likely exceed the value
We charge $125.00 - 185.00 for basic Repairs
This would be a personal call
It would be less expensive for you to replace with "same" DEH-P4600MP
There are a number of good Units, but would require rewiring of the Plugs in your car & many require XM Adapter now rather than built inI prefer Kenwood & JVC, but the prices including XM would be far greater than the Pioneer Unit you have now
What you have described sounds like the Face Plate connections, so try cleaningIf you have a "Brite Pad" use that to get the connection better
not a problem
Brite Pad is like one of those pot scrubbers that are not metallic. It is a rough material type padThis will shine the connections a little better than just using the Alcohol & Cue Tip.If you do not have, not to worry, as Alcohol & Cue Tip should help if it is the connection
THANK YOUlet me know if you need further
Thanks for using J/A