I have created documentation of the HP9845B Monitor Main Board (Rev.A). It has connectors for five boards and one connector for Rear Panel. In the middle are two connectors for CRT cables and an overvoltage protection. The monitor mainboard has size 304 x 208 mm.

Fig. 1 - original monitor board 09845-66571 Rev. A

The next image (created with CAE EdwinXP) shows connections between the connectors on the HP9845B monitor motherboard. I have created a complete detailed circuit diagram for this motherboard. The schematic and knowledge of the connection are required for the future design of new CPU boards that will controls the color LCD.

This photo shows topology of the HP 9845B boards on the mainboard:

Fig. 2 - connection between the connectors on HP9845B Monitor Main Board

Documents:

schematics 09845-66571 rev.A

components location on PCB 09845-66571 rev.A

connectors connections table