If Bell's family had seen a television set in operation they would have really been surprised. This form of transmitting and receiving data without wires was yet to be discovered. Alexander Graham Bell, and his family would have believed the television set was the source of the pictures it presented. Bell might even have removed the cover to look for them, trying to discover how the thing worked. But, no matter how hard or long he examined the television he would not have found the images and sounds produced stored within it.
Science has a similar problem with the human brain.
No matter how hard or long scientists look in the brain for things like consciousness, memory, mind, personality, dreams, NDEs, OBEs, etc. The brain is not the source of these life's events. There is no proof that the NDE, or any other event for that matter, originates within the brain. Nothing has been found stored there. Stimulating the brain at different points to produce different events doesn't prove any of those events are stored within the brain.