Lexmark 1000 - Manual (Page 35)

Repair Information 4-7
4096-00X
System Board Removal
1. Remove the front cover.
2. Remove the carrier frame from the base assembly.
3. Disconnect all cables from the system board.
Remove the four screws securing the system board to the carrier
frame and remove the system board, taking care not to damage the
end-of-form flag. Note the routing of all cables.