I had the same problem & have just tried holding the rectangle button with the + sign in it down for 4-5 seconds and it worked - I am sending this message in here as I can't find where to say thankyou - I was going crazy and such a simple thing to do fixed it - thank you again
Our dog stood on the remote and now we have a lock symbol on the top left hand corner of our Centrex TV. Our remote is not the original and we've tried holding down every button for 4 seconds, turned the power off. Nothing has worked.
I have a centrex 80 cm tv and it has locked. There is a blue screen with a red lock in the top left hand corne. Can you please tell me how to unlock it.
Centrex television (Model: CTT 29 PF 12 is on store receipt; model YKF-64D-42 appears on TV's remote, owner manual misplaced) - padlock symbol showing on blue TV screen - haven't been able to use set for days.