I pressed something on my remote and i have blue screen with a red key symbol in left bottom corner, how can i fix this ?

SOURCE: apex tv has red key in the left hand corner of the...

press the function key and the mute key at the same time :)

SOURCE: Need to unlock Centrex TV model CTT6809SF

Hold down the plus key (bottom right) for 4 seconds

SOURCE: KLH TV LOCKED

press and hold menue button on the tv, for more than 10 seconds to unlock

SOURCE: Blues

Ok Dragonlady On the remote theres a button that says function or will have an F on it. At the same time press the F or Function button and the Mute at the same time. Now remember once its unlocked you may need to reprogram by going into the menu. If you have any more problems call Apex at 866-427-3946, they are very good with helping their customers. Hope this helps. Good Luck

SOURCE: blue screen with key symbol

Very easy to fix!! On the remote theres a function button or an f also on the remote theres a mute button. While the tvs turned on press the function(f) button and the mute at the same time and it will unlock.. Good Luck..BTW this on came from APEX customer service!!