OpenSprinkler › Forums › Hardware Questions › DIY Kit Assembly Questions › SOLVED! Firmware flash OK, but LCD displays rectangle box & stations not working › Reply To: SOLVED! Firmware flash OK, but LCD displays rectangle box & stations not working
OK, problem solved.
I soldered the EXT header, which shorted AVR’s Pin 25, 41, 43 to GND. These pins are used for LCD and stations, thus caused the problem.
My existing ATMEGA644P is damaged, (googled, seems if output pins are shorted to GND, they will be damaged).
Replaced a new ATMEGA644P, LCD is working and stations are working.