Article ID : 00028514 / Last Modified : 02/19/2019

Error: LOCK appears in the display when the function buttons are pressed.

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The LOCK error message will appear in the display of the Audio/Video (A/V) receiver when the function buttons or control knobs stop responding. Follow these steps to try to resolve this issue.

  1. Turn off the power to the A/V receiver.
  2. Unplug the AC power cord for approximately 30 seconds.
  3. Plug the AC power cord back in.
  4. Turn on the power to the A/V receiver.
  5. Attempt to change functions on the A/V receiver.

If the issue is still unresolved, service may be required.

For all Sony products (EXCEPT VAIO computers): To send your product to a Sony facility to be repaired or to check the status of the a repair, visit our eService web site.


For VAIO Computer products: Please call 1-888-4SONYPC (476-6972) for service information for your product. To check the status of your VAIO product repair, have your phone number or Best Buy service number available and call 1-800-433-5778.