Hello, I have found a(nother) hole in my knowledge, and the local "experts" seem to have less understanding than I. Can anyone here enlighten me? I have a 1990 SR800 that I have been playing since 1991. Over the last 6 months it slowly developed a slight distortion (a cool sounding slight drive that added character). Lately I noticed that it has become full on breakup of the tone when I dig in, and it is very pronounced on the E and A strings. Figuring the preamp was shot I upgraded to the NTMB-918F. Alas the problem is in the pups themselves. Does anyone know just what is inside that chunk of epoxy? What might have gone bad and why? With no power to them the E/A side rings but the D/G side is dead (on both the P and the J). When the battery is hooked up I get the performance described above (even wired straight to the amp - no onboard controls of any kind). Can anyone enlighten me? Thanks!