SOURCE: Menu not working.........
Resetting the TV
If the buttons on the
remote AND the buttons on the TV case do not work (channels do not
change and you cannot open or navigate the menu), the TV has stopped
responding. Reset the TV as follows:
NOTE:
Some
TVs have a reset button. If available and accessible, try using the
reset buttons before using the steps below. Using the reset buttons can
save time. 
1. Unplug the TV power cord from the power outlet.
2. Unplug any connected devices (DVD, Set-top boxes, etc...)
3. Press and hold the TV power button for five seconds.
4. Plug the TV power cord back into the power outlet and turn on the TV.
5. Open the on-screen menu to confirm that the TV is responding again.
6. Turn off the TV and reconnect the devices.
7. Turn on the TV.
hope this may help;
Regards,
VOTIT
DON'T FORGET TO RATE:
SOURCE: toshiba 36a40
Double check that the Demonstration in the menu is not set to on. This will cause it to keep scrolling thru.....
SOURCE: nikon coolpix 774 menu buttons don't work
Try resetting the camera back to the factory default setting.
Remove the battery, leave it for 1/2 + hour, insert the battery and configure date time etc.
If it doesn't work then you have faulty camera.
SOURCE: unlocking tv button lock
MY KIDS WERE PLAYING WITH THE BUTTONS ON THE TV NOW WHEN I TRY TOO CHANGF THE CHANNELS OUR VOLUME TV BUTTON LOCK ORTV BUTTONED POPS UP.I DONT HAVE MY REMOTE SO WHAT IS ANOTHER METHOD?
SOURCE: Canon PowerShot G2 buttons don't work
You have a bad button board . This is a single board with a series of small button switches that control all these functions. Most repair shop will charge around 75.00 to fix.
How to perform a hard reset when my LG Nexus 4 is unresponsive
1. Ensure the phone is off.
2. Press and hold the Volume down button and thePower button.
3. Scroll to Recovery mode by pressing theVolume down button.
4. Press the Power button.
5. Press and hold the Power button and then press the Volume down button.
6. Scroll to Wipe data/factory reset using theVolume down button.
7. Press the Power button.
8. Scroll to Yes -- delete all user data by pressing the Volume down button.
9. Press the Power button.
10. The phone will now wipe all contents.
11. Press the Power button.
12. The phone will now reboot to the initial setup screen.
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