To replace the circuit board of your hard drive, a direct swap is not possible. Instead, you have two options: transferring the BIOS chip to a donor board or repairing the original board. Our company offers a service for either repairing hard drive circuit boards or transferring BIOS chips to donor boards.
Procedure:

• buy this item
• Send your circuit board to us.
• We repair the board or make a clone.
• We ship the repaired or clone board back to you.
• If the board is not repairable, we will refund money back to you.

Typical bad hard drive circuit board symptoms:

• No power, No Spin, No Sound.
• Burning smell.
• The circuit board is extremely hot.
• Power surge. connected the hard drive to wrong power supply.
• Obvious damage on the circuit board

For following situations , most likely the circuit boards are OK ,We do not recommend sending the board to us

• The hard drive can spin properly .
• Make clicking sound .
• Being dropped.
• Spin well but cannot be detected