I have this unit with bad reading. Do you know how to find this type of LCD? I don´t know if the problem is the driver or the LCD but I suspect the problem is the LCD itself. Possible to test pin by pin? Only one side with 52 pins, 9,2 cm long x 4,4 cm wide.
Its possible the sanyo Lcd driver has a bad output causing that, however it could also be a bad connection from the Pcb pin to the glass, try a wiggle test and see if anything changes.
If the Lcd is bad your probably on a dead end, as its probably made for the unit, or a range of similar units.