I have a Marantz rs 3557 Century collection stereo reciever. I've had it since new and have never had an issue with it.\n\nThe other day my son's girlfriend was vacuuming around the reciever and it hasn't had any sound since.\n\nI have scoured the internet and this forum for the last day and a half hoping to find information on this thing but I have come up empty handed.\n\nMy son and I are both pretty electronically savy so we can fix this thing. I'm looking for a service manual or at least someone who is pretty well versed in fixing receivers so I know where to start.\n\nI have the top cover off and visually everything looks fine. I have been probing around with my multimeter and when the unit is powered on the three fuses inside have no power throughput at all. I've tested the fuses and all 3 are good. The unit powers up but when it does it beeps 3 times. Once for the power on and then 2 times afterwards. I've never heard these beeps before.\n\nAny help would greatly be appreciated.