[FrankMeng]

I bought a receiver of Onkyo TX-SR 606.
Everthing works fine, except the receiver becomes very hot if the
power is on.
Even there is no signal to the receiver, as long as the power is on, I
can't put my hand on it for more than half a second because the box
burns my hand.
Is this normal for Onkyo TX-SR 606?
Will the overheating cause a problem after a while (several months, or
years)?