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The Red Lock indicates that it has been Child Locked, this could be done by
accidently pressing child lock. On your remote control there is a MUSIC button,
to turn off the red child lock PUSH & HOLD the button. The red lock does not
go off with a qucik push. You need to Push & Hold The music button for about
pls check hideen key on remot cantrol
try digit key [- - -] preesing 3 to 5 sec. and see key lock is off than re set preesing 3 to 5 sec and see on the screen tuning lock is off
lock key on remot cantrol pls. press 5 to 10 sec.and see the screen red padlock is opan or green then try remot cantroll any function use normaly
it could be the child lock, accidenty activated from remote or tv buttons,...goto steup mode and switch off the child loc, or any lock that your tv indicates is active...if the problem continues, might be the gate ic, inside your tv needs repaced or reprogrammed...the number on that ic is in somthing 240co8......8 legged small ic..change it....or refer to qualified tech..
Press MENU to show the on-screen
Press VOL+ or VOL- to highlight SET.
Press CH+ or CH- to highlight PARENTAL CONTROL. Press VOL+ or VOL- to display the
SECRET CODE screen.
Press VOL+ (on the remote) and the CH+ button on the front of the TV at the same time. Press the Number buttons to enter a four-digit code. The code will appear on the screen as you enter it. The code "0000" is the default of the TV. If you have not set up a code previously, then "0000" is the code.You cannot use "0000" after you set your own code (unless you reset the code to "0000").
Press MENU to save the code.
Hope this helps. :}
HERE IS A LINK TO THE USER MANUAL: http://www.p4c.philips.com/files/2/27ms343s/27ms343s_dfu_aen.pdf
It sounds to me like a child lock function, which is usually what the screen + padlock is on TVs. Usually your original remote would have a button / sequence to unlock the mode. If you still have your original remote, look for a child lock button or refer to your remote manual (and/or TV manual for the child lock feature) to unlock the mode.