Consciousness is likened to witnessing to the making evident of matters but if so you must also add that the witness has no eyes, no ears, no body, no tongue, no nose. The idea of witnessing implies that what is witness takes place independently, that it precedes and follows and extends beyond what appears. To say that all is representation should only mean that this is an erroneous conclusion based on the false analogy with the sensory modes. It is true that what you see is only a cross-sectional slice or projection of what is there, that being the nature of vision, but witnessing is not vision nor its analogue. By its nature there is nothing outside of or in excess of it and that is why it is called consciousness. You understand it via analogies, but analogies don't work.