Panpsychism is not as crazy as it sounds.

[Coffee Jesus]

I'm open to the possibility that some mental states persist even after the brain stops working.
We know that some brain damage partitions brain functioning, as with split-brain or blind-sight patients, but we only know that it's partitioning because we can interact with the other partition. If we couldn't interact with the other partition, we might unjustly assume that it simply stopped functioning. Maybe brain death is really just pervasive partitioning.
edit
If you think mental states entail the entity's ability to communicate those states, then you're tying all mental states to language processing, which occurs in specialized parts of the brain.

As such we don't even need to invoke unconsciousness, merely point out that whilst we may be conscious of light in the visible wavelengths, exactly how conscious are we of infrared, radio, ultraviolet and gamma radiation?
We have evolved specific sensory receptors that enable us to detect specific stimuli and via the neural network respond to them.
Thus I conclude that the table is unaware and unconscious of any stimuli I might present.
Of course I can make this interesting;

As with your brain via your eyes, the table is influenced by radiation. The difference is that the table fails to respond to this information because it can't make sense of it.