M'dziko lamakono laukadaulo lomwe likupita patsogolo mwachangu, ma board osindikizira (PCBs) amatenga gawo lofunikira pakugwira ntchito kwa zida zamagetsi. Kuchokera ku mafoni a m'manja kupita ku zipangizo zamankhwala, ma PCB ndi msana wa zamagetsi zamakono, zomwe zimapereka nsanja kuti zigawo zikhale zogwirizana ndikuphatikizidwa mu machitidwe ovuta. Mu blog iyi, tiwona kufunikira kwa ma PCB ndi momwe amakhudzira mafakitale osiyanasiyana.