Sony DVP-S300 Training Manual page 60

Third Generation DVD
This only applies only to multi DVD changer model
DVP-C650 –
Symptom 6: Unit powers ON but no buttons work.
Displays error code E27.
Cause: Ripped flex cable, reference # 180.
Repair Procedure
1. Replace the flex cable (P/N 1-791-200-11) and secure the new flex
cable so the rotating tray table does not shear it. See service bulletin
# 64.
57
Flex
Cable