I had EXACTLY the same problem with a Krell KPS-28c CD player. It was returned to KRELL and they fixed it by replacing the power supply. They said they don't know why it happens (!) but changing the power supply often fixes it. Obviously they have a design problem. KRELL have been VERY helpful and have fixed problems out of warranty with no questions asked even when the piece had been purchased second-hand on Audiogon. I would contact them again if I were you.
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