Casio Z-1 GR Contrast?

[blackjetrock]

I had a similar problem on a, well, I can't remember what, but I think it was a Sharp. It turned out the potentiometer was bad. I took it off and replaced it with a resistor that set a decent contrast. You might need two resistors if you do this if the potentiometer isn't being used as a variable resistor.

It could be the supply voltage that drives the contrast, but I think it's unlikely to be the LCD itself. If the contract is uniformly low then it's probably unlikely to be the LCD to PCB connector.

Andrew