Use a soldering iron to desolder the red wire in the corner of the disc drive circuit board.

Then, desolder the adjacent black wire. Use blunt tweezers to hold and pull away the wires from the circuit board.

Follow general soldering safety guidelines such as wearing eye protection, working in a well-ventilated area, and washing your hands with soap and water after soldering.

Excessive heat may damage electrical components. Don't apply the soldering iron to the board for long amounts of time.

When you install the original circuit board into the replacement disc drive, solder the red wire to the solder pad labeled "R." Solder the black wire to the solder pad labeled "B."