I wired everything once again, but it is behaving still in the same way. No light on the display, only the first row is lit up (if u have a closer look on my LCD, u will see).
In the "broken" LCD photo in this reponse:
I see what looks a LCD that is wired up incorrectly or not completely wired up.
From the datasheet diagram, the pin order is:
14, 13, 12, 11, 10, 9, 8, 7. 6, 5, 4, 3, 2, 1, 15, 16
Looks to me like:
It is hard to tell exactly how it is wired due to some parallax issues.
But for sure there is only 1 set of power connections vs the 2 needed.
and then the r/w line (LCD pin 5) does not appear to be wired up.
From the photo I can't tell if the backlight is not wired up or
if all the control lines are shifted over by 2 pins.
Either way, the way that is wired up, it isn't going to work
and you may not see anything if the backlight power connections
are not hooked up.
You need to wire up the backlight power to turn on the
backlight to be able to see the pixels on that display.
You may need to use a resistor on the backlight.
I'd use like a 100 to 330 ohm resistor to be safe.