Old school use a flash light and touch one wire to battery neg. end thats exposed attach other to case of metal flashlight or neg terminal in case if light comes on its shorted if it doesnt then twist wires at speaker location and light should come on based on type of flash light used.
Other trick - locating a speaker tap the wires on a AA battery and speaker will make a pop noise
If Onkyo (crap) doesn't turn on or turns off after you turn it on with nothing connected it's toast. Shorted wire or bad speaker doesn't sound like a cause if unit has protection circuit.
Yamaha or Denon is better for receivers
Sorry about comment but I have just been thru this alot over the years. I have a client now that has a Home Theater in a box and 3 speakers are blown and the sub died on the second day.
Early comment on adding more speakers with a speaker selector a cheap Receiver can't handle it at average volume for long, the load on the weak amp will kill it.
Other trick - locating a speaker tap the wires on a AA battery and speaker will make a pop noise
If Onkyo (crap) doesn't turn on or turns off after you turn it on with nothing connected it's toast. Shorted wire or bad speaker doesn't sound like a cause if unit has protection circuit.
Yamaha or Denon is better for receivers
Sorry about comment but I have just been thru this alot over the years. I have a client now that has a Home Theater in a box and 3 speakers are blown and the sub died on the second day.
Early comment on adding more speakers with a speaker selector a cheap Receiver can't handle it at average volume for long, the load on the weak amp will kill it.