Peel off the Al tape between buffer board cover and metal frame. This allows the cover to come free without bending the clips at the hinge

Cover on the right side may have its edge tucked under the plastic sheet to protect against power supply board shorts. Need to lift the plastic sheet slightly to free the buffer board cover

Remaining steps will shown cover board flipped rather than removed. This removal step is an update for an improved procedure. Assume buffer board cover is removed in future steps.