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HiI want to change old 16x1 LCD with a new backlight display. (1601A)and an serial adaptor modul. 1602 (4 pin input ) GND,VCC, SDA,SDCOld LCD driver is (40pin HCLP0538AP). pin 1 = VCC, pin 5 =GND, Pin 2 = Data, Pin 3 = CLK.is pin 2 (SDA) iqual to pin 2 (Data,40pin HCLP0538AP) ?is pin 3 (SDC) iqual to pin 3 (CLK,40pin HCLP0538AP) ?tried to connect the LCD incl Serial adaptor but no data on the display.how do I solve this issue. ?kind regards.