Vilo,

I strongly suspect one of the connectors to the keyboard's motherboard has been jarred loose during shipping. However, in order to facilitate a repair it requires a complete disassembly of the keyboard, then inspecting each and every connector, of which there are a large number. Some are situated beneath the mother board, while others are easily accessible. If you do not have considerable electro-mechanical skills, I do not recommend doing this job at home. Any certified Yamaha repair facility can quickly check this out, and the cost averages about $75 an hour. Just opening the keyboard takes about 15 to 25 minutes, and this must be done carefully in order to avoid damage to the SM Card Drive cable. It has nothing to do with your power supply or USB devices, and a minor reset will not solve the problem because you cannot access that area of the OS if the keyboard will not boot up.

Good Luck,

Gary

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Travlin' Easy