My HDD got a powersurge, and would not be recognise in pc anymore, so i want to try swap the pcb, but the replacement pcb has more than 3 chips with 8 pin chips on it. And on the replacment board the seller put 3 arrow stickers on those chips, pointing to a 8 pin chip. So im confused do i only need to replace the one chip. (Was hard to find same model pcb, but couldnt not find the exact rev as mine. But found one in china, so commuication is bit hard to ask questions.)
https://imgur.com/a/hFndd
https://imgur.com/a/hFndd