Henri wrote:
If you can't even adjust contrast you might not have enough contrast voltage. You could try connecting the other end of the contrast potentiometer to +5V instead of GND.
How about the REVERSE pin ? Try connecting it to +5V or GND.
Now I can adjust contast !!! I'm connect 20pin(REVERSE) to +5V and it work !!! But I'm see garbage on my screen ( i mean my LCD connecting wrong ? )
maybe connect LCD like this :
LPT -> LCD
1-----7(C\E)
2-----11(DB0)
3-----12(DB1)
4-----13(DB2)
5-----14(DB3)
6-----15(DB4)
7-----16(DB5)
8-----17(DB6)
9-----18(DB7)
14-----6(RD)
16-----5(WR)
17-----8(C\D)
+5V------3(Vdd),10(RESET),19(FS),20(REVERSE)
GND-----2(GND),1(FG)