got my cab today (Mesa 2x12, not my favorite choice for what i wanted in a cab, but i got a good deal from my cousin). So he brings my amp in and hooks it up before i got there, turns it on, lets it warm up and switches off from standby and theres no sound at all. the indicator light is working, but no sound. Now he didnt mess with the ohm selection on the back, it was set at 8 and each speaker is set at 8 ohms, now i know this isnt right. Could not having it on the right ohm setting produce no sound? i also just stuck a new rectifier tube in it today as the one it came with smashed during shipping. its a JJ GZ34. The fuse isnt blown, if that makes things look better. Its a Metro JTM45 running on KT66's FYI.