Lack of vinyl bass and midrange

Ditto the suspension. You could try dribbling a drop of Stylast in the inner workings of the cartridge to loosen the suspension, it's worked for me before with no problems. Or try a drop of other rubber revitalizer which others have used successfully. This is if the cartridge is toast and destined for the rubbish heap anyway, if you want to keep it in the long haul then safest would be to send the cartridge somewhere for rebuilding.

I think the Stylast will work, dribble only a very small drop into the inner workings, let it sit for a few minutes, then re-mount it and let it play a few records. Both Van den hul and Benz offer rebuilding services, as does Len the Cartridge Man (of Music Maker fame), I believe Benz is the most reasonably priced of these. Lowest price of all with good reports is Expert Stylus Co. in England, but apparently hard to reach, check out Vinyl Engine for info on all of the above.

Ditto Dave's experience: I treated my Kiseki Blue to soem Stylast some 4 years ago when it had the same problem (had been tucked away for a few years) and it's still going strong! The flip side is: Van den Hul anyway refuses to work on cartridges that have been so treated, so if you are thinking of sending it in for a rebuild you might be better off sending it right away before treatment. Again if it is destined for the trash bin anyway then there's nothing to lose.