MKS Gen-2z v1.1/Ramps 1.4/A4988 on Prusa i3 with LCD2004A display
First time everything. I bought a Prusa i3 on an impulse from ebay (250+shipping, yay!), slapped it together, and it ran sort of well just out of the box. Axes fine, display worked, heaters heated, etc . . .
Turns out the factory settings were too low, so I flashed the firmware (arduino IDE) to get eeprom access and bump up the MAX. extruder and bed temp settings. After a few tweaks, the machine runs okay (ABS; EXT0 = 250C; BED = 100), but the bed doesn't come up to temp (fix in progress).
My problem is that I lost the LCD display after I uploaded the firmware, which ran normally prior, but now just shows 16 x 4 boxes where characters are supposed to display. It used to show extruder and bed temps as well as cartesian coordinates of the extruder relative to the bed.
I have no real programming experience, and am wading into this project with only the #DEFINEs figured out. The firmware config tool (ver. 0.91) is having issues with compiling (I think I picked the wrong LCD the first time around, but it compiled and uploaded fine).
So whats the estimated damage, what and where is the code for the LCD2004A, and can I get some help with the firmware code not properly compiling? I can upload my Arduino sketches when I get home later. Thanks in advance.