On the front of the camera is a 2nd ribbon cable going under the camera to the LCD screen - this one contains the data and timing signals which drive the display.

Carefully lift the black plastic latch and then pull the ribbon cable out of its connector

The large black integrated circuit on the left is an NEC microprocessor, apparently a custom variant of an 80186. Above the tripod socket is a small battery - for maintaining the real-time clock.