Hello, I bought a Sony KP-43T70 back in 2000. The back of the unit says manufactured in April 2000. I had a problem with it and the Sony service person says the part I need is no longer manufactured. Then says I need the entire board replaced because this non-manufactured part comes on the board. Of course this board is much more expensive. Does this sound normal? The business in question is reputable, but something just doesn't sound right.