thanx for this information, so I can be shure that it's no software related problem. I tested the Voltage at the display and I checked, if there are 220Ohm between the pin of the Display and the corresponding pin of the PIC. Perhaps I have the wrong display? I bought a Display for a Nokia 3310, I don't think there are differences. So I'm going to check all connections, voltages, resistors...again. I would be verry pretty if I get this display working, because it's not only cheap but also extrem flat, small, nice...