I sent the unit to a regional center for service. They told me that the network card needed to be replaced, but it was discontinued. Marantz sent me a refurbished sr5009 as a replacement within one week. I think Marantz did a good job in resolving my issue promptly.My 7008 had a similar issue that lasted for several months, but it would work again once I unplugged the unit for at least 30 seconds. I fixed the problem for good by putting it on a static IP address and turning off the dns on the unit.