I’m not getting any characters on the LCD, all I get is a dark screen with the back LED on. At first I would get some kind of wave length light pattern but now I get nothing at all. I change the wires around to see if that was the issue but unsuccessful so far, I have also checked the solder but I think is ok. Still trying different things, but any help is welcome.
Looks like your potentiometer isn’t connected to power and ground since it’s on a separate breadboard.
Try jumpering the power buses on both breadboards together and then adjusting the contrast potentiometer. 
TS-Chris:
Looks like your potentiometer isn’t connected to power and ground since it’s on a separate breadboard.Try jumpering the power buses on both breadboards together and then adjusting the contrast potentiometer.
Oh sorry I missed that, but I still get don’t get any characters
Your contrast is set too low, you need to adjust the potentiometer until the white boxes just about disappear.
You could also have a code or connection issue. Give the code and connections [in this guide a try.
https://cdn.sparkfun.com/r/600-600/asse … itzing.jpg](SparkFun Inventor's Kit Experiment Guide - v4.1 - SparkFun Learn)
Ok I’ll try it out
I followed the guide, I got new wires, I slowly moved around the potentiometer but still nothing. Could it be that the LCD might be defective?
The links below are images of the results I’m getting
https://drive.google.com/file/d/1DYZnBy … p=drivesdk
Yeah, something definitely looks wrong with the display.
Can I get your SparkFun order/invoice number?