Use your fingernail or the edge of a plastic opening tool to carefully flip up the lower LCD ribbon cable retaining flap.

Make sure you are flipping up the retaining flap, not the socket itself.

Pull the lower LCD assembly straight away to separate the lower LCD ribbon cable from its socket on the motherboard.

Remove the lower LCD assembly from the motherboard.

When reinstalling lower LCD, ensure it has insulation on the back to prevent a short circuit with the motherboard.