2)Most of Number 1 side goes to power connector

3) Even though there is no errors on connection, contract resistance, electronic noise and misconnection cause malfunctioning of hard disk drive.

2) Please check your drives are detected by auction detection.

3) If your drives are recognized in Bios setup utility, it shows that your drive is ready and there is less possibility of physical errors, but bad sectors in disk would not be found by Bios setup utility

Non working of spindle motor would be cause by no electricity supply, PCBA bad, spindle motor bad, sticking of magenetic head and disk.
If you can hear grinding or clicking sound after the power supply it shows disk is scratched or breaking down of head slider. If you can hear clicking or fluctuation sound, it notify to you that spindle motors run but cannot get important data for operation, and it cause retrying action. This phenomenon is so called "not ready"

2) If your drive have successfully finished these performance, it shows commnunication between PCB and system is normal. but it still have a possibility of bad sectors. .

1) Partition => Fdisk.exe
2) Format => Format c:/s/v
3) ScanDisk , NDD etc
4) The surface condition will be defective from up Test result or the case which will have Bad Sector repairs and when the thing authorization which it will use that way it is decided use the thing authorization which it will do.