Thank you all for responding.
@lewm, real simple, a microscope. microtweezers (I used them to pull out splinters) and a Weller soldering station with the smallest tip on. The back plate is held on by one screw. I can inspect the solder joints and lead out wires. I will not go any farther.
@jcarr Thank you so much for responding. No surprise you are the first one to have plausible explanations for the problem. I am definitely not getting involved with the coils, lead out wires maybe , but not the coils. One person suggested that it was a cracked diamond 😆 Do you think the coils can be adequately replaced by local techs?
@whart Given that it is virtually impossible to get through to MSL you can bet that MoFi is setting the warranty. The Japanese culture would never allow this sort of treatment. If I can get an address for them in Japan I will send them a letter explaining the situation. Companies that I have dealt with who handled this type of issue beautifully include Soundsmith, Musical Surroundings, Clearaudio, Elusive Disc, B+H Photo, Atma-Sphere and The Cable Company. These are only the ones I have had direct experience with. I'm sure there are a lot of others.
For those interested in the diamond (don't know it this is going to work)
"C:\Users\mijos\OneDrive\Documents\MSL AP.jpg" and
"C:\Users\mijos\OneDrive\Documents\MSL Lat.jpg"
@newtoncr Does that refer to Newton Center, MA? I have not heard the Sig Platinum mistrack in the bass and I have boosted subwoofers. Check your tonearm setup and make sure the stylus is absolutely clean UNDER MAGNIFICATION. You would be surprised at the stuff that styluses can collect especially with some record cleaning solutions. You can not tell with the naked eye. I use an artist brush with the bristles cut 1/2 way back. Many mild stylus cleaning solutions will not work. There are times when you have no choice but to use 50% ethanol is water. If the stylus is clean and your setup is good you have a defective cartridge in which case you are in the same boat I am in.