Hi, I bought my first marantz 2230 on ebay for a good price from France, I live in Madrid Spain and arrived on Wednesday with a problem crackle / pop / in the left channel during on / off and intermittent recurrence during playback in all the inputs and tuner too. The noise has nothing to do with the pots or buttons although I had planned a cleaning with deoxit, I sent a message to the seller and he claimed that it was in perfect condition. The thing is that I have been listening yesterday and today for several hours and it seems that the problem has diminished to the point that today I have not heard any crack, pop or static. My question is: Could it be that in the transport in the hold of the plane during shipment has suffered some sudden change in temperature that has made these problems?, it may be temporary? and is it fixed at all? Thanks in advance.