- Menu items are grayed out.
- The buttons do not appear on the LCD monitor.
- The buttons on the touch panel do not work correctly or do not work at all.
- The buttons on the LCD monitor quickly disappear.
- There are dots in the shape of a grid on the monitor.
- The backlight of the LCD monitor turns off if you do not attempt to operate this product for a while.
- The image in the LCD monitor is not clear.