Most modern systems have special little protective tricks. Otherwise having a guitar amp too close to ones DAW computer would mess things up. The magnets in cabinets can be really strong.
Or when U remembered you could magnetise them all with the magnet U dissected from that old hard drive . Good thing U also remembered to keep your magnetised screwdrivers far away from your VHS wedding videos of family history,your been meaning to transfer to another magnetic form...
Austenitic corrosion resistant screws routinely undergo deformation induced partial transformation to martensite,which has appreciable ferromagnetism. BS EN ISO 3506 fasteners in the F C,M and D grades are all ferromagnetic
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https://www.youtube.com/watch?v=U8LWTe5CqQg