One possibility is a "strand short", ie a single strand of your speaker wire shorting between speaker terminals. A hard short will put your receiver into shutdown immediately, while a strand short will often let it play for a while.

Easiest thing to do is disconnect all the speakers carefully and check each one as you disconnect for a loose strand. Next step would be to check the speaker ends of the wires for a short.

If you don't find anything, I would try to get the receiver replaced while the store still remembers you.


M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8