FLIPPING THE A1 BOARD
Two screws secure the A1 board and power supply to the lower portion of the case. Once these screws are removed, hold the power supply securely and pivot the parts on the hinges to a full 180 degrees. Use a foam or bubble wrap base to lay the flipped components on, to avoid any damage to the A1 board pins.
Once opened, you can now access all the expansion cards and both sides of the video display. This also gives you access to the four screws to open a small panel, which is some additional comms. related external ports.