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You should have its remote control to select its inputs. If you have one, check the remote control for its infra-red emission. Check it with fresh batteries. Check by pressing each button on it at a time; and see whether all of it generates infrared signal while pressing. If it is found OK, check and replace the infrared sensor inside the TV. If you wish to get some details; check the site linked here. It has details about how to check a remote control; by one among the post. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ If the remote control is found OK; check and replace the infra-red sensor inside the TV. Contact any service technician.
When not in a setting mode, pressing and holding UP & DOWN keys for 3 seconds, the key pad is locked. After setting it, the LOCK icon will be displayed on LCD to indicate that key pad has been locked and all the keys are disabled. At that case, the remote won't send out any codes. The LOCK icon on the LCD flash 3 times, 0.5 seconds for ON, 0.5 seconds for OFF, and press & hold UP & DOWN keys for 3 seconds, the remote is un-locked.
Programming When Remote control added or replaced. System malfunction. How Obtain all remote controls. A maximum of 3 remote controls can be programmed. Switch ignition ON. Repeat procedure below 3 times: Within 4 seconds: Press lock or unlock button. Within 4 seconds: Switch ignition OFF. Within 4 seconds: Switch ignition ON. Within 4 seconds: Press lock or unlock button. System should now lock or unlock vehicle. Within 4 seconds: Press lock or unlock button. Within 10 seconds: Press lock or unlock button of first remote control. System should now lock or unlock vehicle. Press lock or unlock button of second remote control. System should now lock or unlock vehicle. Press lock or unlock button of third remote control. System should now lock or unlock vehicle. Switch ignition OFF. Remove key. Check operation of all programmed remote controls. NOTE: If less than 3 remote controls are to be programmed, remove ignition key after programming last remote control.
The solution is so simple! Press the POWER (RED) button and the TV/AV button simultaneously - hey presto! the child lock will switch off and you will have your TV back working properly.
Usually, once child lock is on, the set will not respond to the front panel buttons and you need the power button on the remote control to turn the TV on. Then go into the menu and turn child lock off.
Press and hold the TV/AV button and then press the red on/off button, the TV screen will become black, and any buttons on the main unit or the remote control become inoperative. If you want to switch on the TV, press and hold the TV/AV button and then press the ON/OFF button again, the TV will return to the normal TV reception
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