If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Unlock procedure and to override the password lock of many popular brand TVs and other devices are given. Search the site by type in this key phrase "How to unlock television"; in the search box at the top left of the display window, to get gathered related posts.
SOURCE: key lock on soniq plasma tv witout remote control
Unfortunately the key lock cannot be deactivated without a remote, for it will defeat the purpose of key-locking. You can order a replacement remote, you need to have the exact information of your TV's model/version ( the barcode on the back of the TV starts in REVxxxx).
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