To use this DiGiCo SD9 Digital Mixing Console, first connect it to the correct power supply. Then, you can start using the keyboard to operate the console and adjust settings. Remember, since one PSU is missing, you need to find a suitable replacement if you want the console to work at its best. As for the rusty parts on the back, keep an eye on them. If the rust spreads or affects the console's performance, you may need to clean or replace those parts. Regularly check the console for any loose connections or signs of wear and tear. This will help keep your console in good working condition.
