i recently built a Samplerbox with the same I2C-Display as in the tutorial.
Everything worked fine until I turned it on one day and the display only shows "0000" (like it is powered but get no signal). If I change the Set/Programm it really shortly shows the "L" for loading or "E" for empty, but its only a blink of an eye. It seems as the displayed value is getting overwritten instantly somehow... Is someone familiar to this problem?
Another thing: I'm using it for launching backing tracks for my band and I noticed that if I press an unassigned button it plays the Sample on the previous note a little faster and pitched. Is this a bug or a feature and if second can I turn it off?