Hi Panos the mother board cost 1000 US dollars and 200 more dollars for the technician; in Indonésia you can have nearly two brand new PSR S970 for this price! But it's like this here; it's very expensive here; we've just one dealer for Yamaha so we've just to pay the price as i Don't want to buy my Equipment on internet; we're too far from Europe! But the KB works great ant it's seems that i've an IBM mothers board now as on YEM i've a new identification number; perhaps my first mother board wasn't a Japan one! I've played yesterday for God Mothers day and sound was very good; all the best to you and yours, cheers Patrick