even though this was a problem with the early K 3 II, you could try to call
". . . If your camera is one of those few which is affected by this issue and you're in the US market, you should call the Ricoh Imaging USA customer service department at 1-800-234-0276 to arrange for your camera to be serviced. If you're outside of the United States, we would recommend contacting your local Ricoh Imaging office or authorized Ricoh dealer for advice as to how to proceed. "
Ricoh offers fix for Pentax K3 II power-off problem
or Precision the official repair company in the US
Contact Information:
Customer Service Phone: 860-272-2100
Customer Service Phone Hours:
Monday – Friday: 9:00 AM ET – 5:00 PM ET
http://www.precisioncamera.com/