I recently purchased a 2x20 LCD display and upon reading up on tutorials (like the RaspberryPiSpy one) I used the code provided (http://www.raspberrypi-spy.co.uk/2012/0 ... ng-python/) and wired up the display to the Pi through a breadboard. The only problem is that nothing shows on the screen. I've checked through all the wiring and code and it seems to be in working order. On the display it shows a line of black boxes on the first line and nothing changes when I run the code.
The display isn't the problem because I bought 2 and they both have the same problems.
Anyone have any idea what I might be doing wrong? It's driving me crazy!