Just fitted a onechip to a psone (2nd board revision) all is working fine, imports, backups,all good. Just one thing, when the discs are spinning, there is a constant noise at intervals, like a psst, psst, psst sound, hard to describe, but I suppose best would be as if the disc was touching something when spinning. Anyway, it was not there before fitting of the chip and is there both on backups and originals. Disc is fine, it's not the disc spinning off centre and hitting anything (first thing I thought), and I've run with the case off just to make sure, ribbon cables for the laser are in all the way. If the disc is spinning it's there. It's not very loud, can only really hear it when I'm close to the psone, but I know it was not there before. Any ideas? or is it just something to do with how the onechip works, that causes that side effect. Thanks.