Ok..if you noe...very simple
1)power down

ff the amp main switch & disconnect the socket...NOT YOUR HOUSE SUPPLY!!! C liao
2)Take a multimeter(Best Digital one).Disconnect the cable(normally Red +ve & White -ve) of your speaker at the back panel.
3)Set your multimeter in Ohm mode & put the 2 probe on the speaker terminal(red probe to the speaker +V & black probe to the speaker -ve).There should be a reading(RESISTANCE),if not your speaker is an open circuit one which need to be replace.
Ha...Ha...there's reading???...MUst be confidently dare
1)Need to Power UP/ Switch "on"the Amp.Do not let the two wire speaker connected each other or touches the amp body.
2)Set your multimeter in Volt Range& place the 2 probe at the 2 wire being disconnected(similar like part 3 procedure)
3)There should be reading,if not the internal component of your amp.is damage.
Pls Sms me if not sure.
B happy to help u
Take care and good luck
Got your insurance ready....
He...He...
Juz a joke
Dolwood
92988974
Guitar Tech