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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.
Without its remote control; you can't unlock it.
If you wish to buy its original remote control, contact the authorized service centre, or authorized dealer to your device brand. They can either give you a genuine remote control to your device, or can direct you, from where can you purchase a suitable one. Gopakumar Gopalan Google
Possibly, you will need an original remote to disable or turn off this feature. And some child lock can be accessible through neither MENU of your tv or remote. Check CHILD LOCK option to remove it. If it is a screen lock type of CHILD LOCK feature of tv (a Blue Background display a LOCK icon) and your original remote is lost, try a universal remote for you to possibly unlock it. Thanks for using Fixya.
The TV is locked by someway. If you're using a universal remote control, this might have happen. If you wish to unlock it, you must have its original remote control. For more information go to http://electronicshelponline.blogspot.com/ Unlock procedure to many brand TVs are given. Pull up older posts.
Most TVs will have a "Press for 5-10 seconds" unlock function. Usually it's holding the power button that unlocks it, but if that doesn't work, try all the other panel buttons in the same manner.
The power button on the TV doesn't work because of the child lock?
I went over the copy of your manual for your TV. It must be the child lock timer problem.
I would try leaving the TV unplugged for 30 mins and see if that reset the TV and releases the lock.
If it doesn't work, the remote needs to be replaced. A universal remotes aren't really universal when you need to use special buttons. The remote made for the TV is the best.
If your TV is the model 47PFL7403D, here's the cheapest place to buy a replacement. http://www.philips.newremotecontrol.com/catalog_item.php?catnum=313922852812
you will need your original remote control and go through the menu to unlock it. find your original remote control by typing in your TV model number in the search on www.replacementremotes.com and your original remote will pop right up. very easy to use.
To unlock the Panel Lock,
Parent Lock, or Child Lock, follow these steps:
Turn on your TV.
On the remote, press
the Menu button. The Set-Up
Menu appears.
Scroll to the Key
Lock function and set
function to Off.
Press the Exit button to exit.
Note: If you don't have a remote, you may
be able to do the same thing by pressing the Menu button on the front or side
panel of your TV and using the volume or channel up and down buttons on the
TV to scroll to the Key Lock function and set it to Off.
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