Hey i have one of those suround systems and i have the same problem it comes up saying F61,My one turns itself of every 4 and sometimes 6 hours and then i can't turn it back on and that F61 comes up. After about 2 to 3 hours i can turn it on, i was wondering if it was on a timer thats why i need the manual to turn it of. Did you find out what it means and also do you have the manual i boughtthis machine of a cash and carrie mob and i got it cheap because it didn't have a manual or a remote control, i can't get one of Technics as they are now Panasonic and they recon i won't beable to get one. If you have one could you email it to me or send it to me to 4 Poynings Street Westminster Perth 6061 If i find the problem i will let you know. I really apreciate it heaps if you can help me on this. Thanks mate Regards Gary