Hi, I have a Kurzweil Mark 10. I bought it brand new. It has been working great for many years but recently it doesn't turn on. When I press the I/o switch ON down underneath, I get a short lighting of the controllers/levels and than it goes off. I have noticed that next to the switch, the two fuses holders are missing. I have never paid attention but I believe they are suppose to be there. Since I can not find them, could you tell me the part number and where can I get i get them from? I see online all different kinds but mine should not have a tread.They probably just lock in ??. Thank you