If you attach the antenna, does the noise go up substantially? If yes and if you can hear only CW stations but no SSB then you have to just move the trimmer gently to cover the SSB portion of the band.
if the receiver noise is not going up when you attach the antenna, then, more often than not, this is just a problem of T1, T2, T3 being bent in the transit. The tinned portions of the wires from these three transformers often touch each other leading to this deafness. Keep the antenna connected and gently move the wires of these transformers away from each other. This should fix it.