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If you find that your Apex TV is showing a blank screen with a red key on the bottom left then the Screen Lock otherwise known as Child Lock or Parental Control has been accidentally activated and your TV will not respond to commands from the remote control.
To resolve this and reactivate the TV simply press the (function or F) button and hold down the mute button on the remote at the same time for around 10 seconds. This will unlock the screen and allow you to view the channel as desired.
If your TV asks for a 4-digit code or password please enter 3308 or 6688 to unlock the screen or to reset any preset rating levels.
This extract is taken from an Apex Manual specific to the child lock function;
The Childlock function is designed to prevent chiIdren from watching TV. To activate: HoId down the F button and then press the MUTE button until the symboI “ ” appears on the screen. The TV will enter the Childlock mode. Except for the “ ” symbol the screen becomes blue or black . To unlock the TV hoId down the F button and then press the MUTE button again.
Please Note: The Childlock can be set or cancelIed only by the remote controI. After setting Childlock, secure the remote control in a safe place.
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this could be correct as the signal for the Camera LCD screen is now being sent to what ever device is connected on the TV out cable. ensure your connection is Camera - TV out TV - Video in. ensure that your TV is set to the correct channel or input setting to view the signal from the camera.
I found this online somewhere and it cleared my problem.
(my problem was a blue screen that said my input was locked enter in your code using the 10 key pad. Both inputs were locked, I used the steps below and it cleared it. We are now watching a dvd for the first time in months!) Thank you Bob Waterman whoever you are!)
MITSUBISHI CS3114R
Parental Lock
This system can lock each channel or different channels on ANT A and ANT B as well as locking each of the EXT inputs, so you should confirm what is locked before trying to unlock.
1 On the remote, set the TV/VCR switch to the TV position Or . Depending on which remote is being used Press the TV mode button at the top.
2. Turn on the TV and using the SCAN buttons (or 10 KEY FAD) and the INPUT buttons check each channel and input to establish which channels and inputs are locked. The screen will tell you if the channel or input is locked.
3. Press the button labeled MENU. The screen will show the main TV menu.
4. Press the #5 button (channel lock option). The screen will change to show the channel lock System Menu. This screen will indicate that the lock system is either ON or OFF.
IF THE SCREEN INDICATES LOCK IS ON, GO TO STEP 5 OR: IF THE SCREEN INDICATES THE LOCK IS OFF, GO TO STEP 5A
5. Press the #3 button. (SELECT CHANNELS TO LOCK option). The screen will ask for the code number. Press the #9 and QV buttons at the same time.
Notes: The screen will change to show an information display that will show the selected antenna and channel or input. The display is superimposed over the picture. This display will indicate that the channel or input is either locked or unlocked. In the lower middle will be instructions to use the 10-key pad or SCAN buttons to select the desired channels (or the INPUT button to change antennas or select the EXT inputs). At the bottom of the screen will be instructions on how to change the current LOCK status (if unlocked use the ENTER button to lock, or if locked use the CANCEL button to unlock).
NOW GO TO STEP #6.
5a. Press the #1 button (channel lock ON option). The screen will ask for a code number. Use the 10-KEY PAD to enter a new code number (We suggest 1111) and then press the ENTER button.
Notes: The screen will change to show an information display that will show the selected antenna and channel or input. The display is superimposed over the picture. This display will indicate that the channel or input is either locked or unlocked. In the lower middle will be instructions to use the 10-key pad or SCAN buttons to select the desired channels (or the INPUT button to change antennas or select the EXT inputs). At the bottom of the screen will be instructions on how to change the current LOCK status (if unlocked use the ENTER button to lock, or if locked use the CANCEL button to unlock).
NOW GO TO STEP #6.
6. Use the 10 KEY PAD or SCAN buttons to select the channels that are locked, or, use the INPUT button to select the external inputs that are locked.
7. At each locked channel or input press the CANCEL button. The screen will indicate that the channel or input is either locked or unlocked.
8. When all of the channels and/or inputs are unlocked, press the MENU button again. TV main menu will be displayed.
9. Press the #5 button (CHANNEL LOCK option).
10. Press the #2 button (channel lock OFF option). The screen will now ask for a code number again.
11. Press the #9 and QV buttons at the same time. The screen will return to the CHANNEL LOCK MENU and indicate that the lock is OFF
12. Press the MENU button twice to return to normal viewing.
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