PCB: 2061-701335-C00 AM (XC 2W19 27MN 8 0005280 7285)
HDD has both (sata and legacy power supply) and i accidentally connected legacy power connector (4 wires) reversely i.e 12v went into 5v , 5v into 12v.
Also GND was also changed ( maybe not for GND as both middle are GND ) using external power adaptor (which i think uses 3 cables i.e 12v - GND 5v )
pic of adaptor
Now when connected correctly chips U1 and U5 on PCB starts to heat very quickly( cannot be touched after 10-15 sec)
and no spinning can heard or felt by touching.
upon careful inspection R120 and 6pin transistor ( marked in pic ) is burned.
So, i wanted to know
1- PCB swapping will work in this situation
2-To what extend DCM and PCB no should be matched.
3- would the TVS saved the Preamp from this over voltage or not.(U1 and U5 heating, R120 and 6pin transistor burned)
4-is swaping PCB with ROM U12 only is permanat fix or can HDD fail anytime.
Need advice from experienced fellow members (like fzabkar.)