We have ordered DisplayTech 16x2 LCD '162HCCBC3LP.' LCD initialization and Character display Code implemented for   4 bit mode as per data sheet and checked through simulation and found that the LCD displaying Text correctly.             But when i am checking in real the LCD not displaying any text showing blank screen (image attached).

I have checked two devices and found that same behavior. can you confirm me either i am missing any instruction sequence or devices not working.