I'm performing a console self test as described below after troubleshooting a "NO CONTROLLER DATA" error and I believe to ahve isolated the issue to this specific console. At the point where I am supposed to test the display by pressing the keypad buttons, I get a screen full of question marks as seen in the picture. Has anybody experienced this issue?
[SIZE=10pt]Disconnect the console from the controller. Connect +12 and GND terminals to a 12-volt source (or a fresh 9-volt transistor battery.) The console beeper will beep twice per second, the LCD backlight and the keypad key will be lit, and the LCD will display "NO CONTROLLER DATA". [/SIZE]
[SIZE=10pt]Simultaneously press and hold the 7 and the down arrow ([/SIZE][SIZE=10pt]) keys for approximately 3 seconds. The beeper will beep 5 times, the LCD backlight and keypad backlight will turn off, and the display will clear. The LED at the top right corner of the console will start to cycle through its different colors (red, green, yellow, then turns off). At the end of each cycle the beeper will beep once. [/SIZE]
[SIZE=10pt]Press any key. The LCD backlight and the keypad key backlight will turn on.
Press the keys in the following order and verify that the appropriate character fills the screen. 0 - 9, *, #, AWAY (A), [/SIZE]
[SIZE=10pt]NIGHT (B), DAY (C), OFF (D),[/SIZE][SIZE=10pt](filled blocks), and[/SIZE][SIZE=10pt](blanks).
If this is successful, the console is good. Simultaneously press and hold the 7 and down arrow ([/SIZE][SIZE=10pt]) keys to exit the self test mode [/SIZE]
[SIZE=10pt]or disconnect power. [/SIZE]
[SIZE=10pt]Disconnect the console from the controller. Connect +12 and GND terminals to a 12-volt source (or a fresh 9-volt transistor battery.) The console beeper will beep twice per second, the LCD backlight and the keypad key will be lit, and the LCD will display "NO CONTROLLER DATA". [/SIZE]
[SIZE=10pt]Simultaneously press and hold the 7 and the down arrow ([/SIZE][SIZE=10pt]) keys for approximately 3 seconds. The beeper will beep 5 times, the LCD backlight and keypad backlight will turn off, and the display will clear. The LED at the top right corner of the console will start to cycle through its different colors (red, green, yellow, then turns off). At the end of each cycle the beeper will beep once. [/SIZE]
[SIZE=10pt]Press any key. The LCD backlight and the keypad key backlight will turn on.
Press the keys in the following order and verify that the appropriate character fills the screen. 0 - 9, *, #, AWAY (A), [/SIZE]
[SIZE=10pt]NIGHT (B), DAY (C), OFF (D),[/SIZE][SIZE=10pt](filled blocks), and[/SIZE][SIZE=10pt](blanks).
If this is successful, the console is good. Simultaneously press and hold the 7 and down arrow ([/SIZE][SIZE=10pt]) keys to exit the self test mode [/SIZE]
[SIZE=10pt]or disconnect power. [/SIZE]