Setting the sleep timer, Using the control panel lock feature, Chapter 5: using the tv’s basic features – Toshiba 50HM66 User Manual
Page 39: Press y and highlight the locks menu icon, Press b to display the pin code entering screen, Enter your four-digit pin code and press t, Press b to highlight front panel lock, Press [ until it is set to 0 minutes, Press y and open the setup menu, Highlight sleep timer and press t

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