SOURCE: child lock
frist see if the control panel on your tv works, if so then check and see if the eye on your tv is dirty sometimes they are hard to get to i took my pocket knife and cleaned mine or air in can should work. when the eye gets dirty on the tv it won't respond to the remote. hope this helps
Instructions
Locate
the manual for your television. Though slightly embarrassing, accidentally
turning on the child lock to a TV is a common problem. The section In the
manual about how to set the child lock feature will also explain how to unlock
it.
Try
a few "universal methods" for unlocking the child lock. Some
televisions have a universal code built in for disabling the child lock --no
matter what your code is. A common code is "0000."
Unplug your television for a few minutes. The internal battery of the TV is what helps remember what your code. If the TV is unplugged for an extended period of time, it clears the internal memory, which in turn will reset your child lock code.
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