Hello,
as written in the Subject I'm running a Linn LP12 with a Mission 774 arm and a Audio Technica AT33E cartridge.
It was working fine until yesterday, but when I dropped the arm (using the lever) to play a record, this horrendous static noise kicked in. It sounds basically like "ground" noise. I noticed the part hightlighted in Picture 2 was out of place, so I put it again where it should be. Still, when I try to play a record now I still get this noise from the left channel, and there's only music coming from the right channel.
I attach two pics, in case they are of any help.
Any ideas? I'd prefer to avoid taking this to a specialist...
Thanks in advance.

