I put the 9v battery to the speakers and its making a noise. I guess it is working? So Il try and see what the problem is on the circuit board. I dont have a ohms meter by the way. I appreciate all the help  :dbtu: 

Thanks people I have used your advise. I am slowly making progress. My speaker is Kind of working, Its just really, really quiet. You can barely hear it unless you are close to the amp. Any more suggestions? Thanks again!

iv tried all these but its still not working  . but thanx 4 helping  :dbtu:

hi phil and thanks. No I cant see one  . Does it look like a normal Jack socket? IF so there is nothing on the back

Hey everyone. Can anyone help me? My marshall MG30 DFX hasn't been working for some time. At first it would cut out and go really quiet when I was playing on it. Now the sound doesn't work at all. The strange thing is that If I plug headphones in to the output socket I can hear the sound coming out fine.
Im not an electrical engineer so if anyone replies, please simplify for me. :duh Thanks   :dbtu: