It's not the PCB. You likely have firmware (internal !) or dead head(s).
If you remove the PCB you loose your warranty (if they see...)
No free tool can help you revive the HDD in this state. If you REALLY need your data ask a pro - with proper HW tools the diagnose is easy - and then decide.
If you have delicate data inside (I won't care because if your drive is factory repaired and/or refurbished, as a part of the repair process the drive is erased) buy a new one and put it in a drawer , waiting for better times.
P.S. the drive surely overheated A LOT or experienced a shock or electrical failure. Otherwise, it was a lemon. If properly handled, they won't fail over YEARS. Advice : buy smaller drives, NOT on enclosures and DO NOT connect externally with USB boxes. Buy 1st choice drives from 1st class distributors and beware of discount/low prices. Drives are meant to be installed or use HORIZONTALLY and handled like EGGS. If you want to have such drives on 24/7 you MUST provide clean power supply and adequate heat sinking/vent. Can't tell you more. I never had storage problems
but I'm a pro

and don't want eventually to give away money to colleagues (LOL !!)
Regards.