The service mode on a Sony television system sets your TV to its factory settings. You have probably adjusted the settings of the television after setting it up in your home. If the TV's picture and audio quality are not satisfactory, you may want to put the television back into its original service mode.
Push the "Power" button on the Sony television to turn it on.
Hold down the "Reset" button on the remote control
Push down the "Power" button on the TV while still holding the "Reset" button on the remote control. The TV will turn off and back on.
Release the "Reset" button on the remote control . The television is set to into its original settings.