Yeah, I do. I had the same problem some time ago and after doing what I was told by a technician, it seems to be working fine. What you have to do is unplug all the speaker cables from the receiver and then unplug the power cord. They told me to leave it unplugged for about 5 hours but I just left it for a few days. Then plug all the speaker wires back in and then the power cord and your problem should be fixed. However, check all the power connections wherever you plug in your system because F61 means there is a power supply error. So make sure you don't have too many things connected into the same plug and everything else looks fine.

I have the same problem with Panasonic SA-HT75 working on SC-HT75, if I switch it on F61 appears for few seconds and it switches off itself. If someone knows how to solve this problem reply ASAP