Registered Device cannot be Deleted [10/2017 - 11/2021]: Procedure

1. Check if a registered portable player can be deleted normally.

   OK

   Registered portable player can be deleted normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2017 - 10/2020]  , or refer to  PROBLEM SYMPTOMS TABLE [10/2020 - 11/2021]