Dear Troy, Thanks a lot for prompt reply. The LK204 is connected to Arduino via RS232 and Tx/Rx pins of Arduino are used to update the program. I did manual override. The present state is: i) I can change display brightness and contrast ii) I can change the state of three LEDs and keypad backlight i...

My LK204-7T display was working correctly and I'd interfaced it to Arduino. Now it is not responding properly and I'm not not able to pinpoint what caused the error. I can only change the display brightness and contrast using uProject but cannot make anything to display on LCD. It gives one characte...