Have you identified pin 1 correctly and plugged the 4050 in the correct way around?
Is the backlight LED working? If it is, you should see some white light leaking out around the edges of the display.
Have you identified pin 1 correctly and plugged the 4050 in the correct way around?
Is the backlight LED working? If it is, you should see some white light leaking out around the edges of the display.