I have the hardware technical manual... Firstly, a pinout of the tapewire to the LCD module (it plugs into the keyboard PCB). 1 Gnd 2 CS0/ These are the chip select lines for the 3 CS4/ 6 LCD driver chips (7227) 4 CS2/ 5 CS1/ 6 CS3/ 7 CS5/ 8 Reset 9 Clk 10 C/D (Command/Data select) 11 SI (Serial In) 12 SCK/ (Shift clock) 13 SO/Busy (serial output/busy line) 14 Vcc (LCD supply voltage) The LCD driver chip is actually a standard, not custom, part. NEC uPD7227. I have a data sheet on it I think. Now, I would start by checking that LCD supply voltage signal. It starts on the main board where IC 2C (4049) acts as an oscillator and driver to operate a voltage doubler, You should see about 7V (I think) on the +ve end of C1 or C6. This then goes up to the keyboard, to a 2 transistor voltage controller circuit there. Check for an adjustable voltage (set with the thumbwheel on the side of the machine) at the emitter of Q2 on the keyboard. This voltage, BTW, is fed back to the mainboard to power some of the ICs that connect to the LCD driver chips. Setting it up near a 'scope would be a pain, but I can do voltage readings or logic analyster traces if you think that would help. -tony