Once you have confirmed that you have a faulty mainboard and purchased a replacement, you need to prepare it before installation.

Begin by replacing the original fan as a preventative measure to avoid future issues. Use the best fluid dynamic bearing fan you can find, such as the Noctua NF-A4x10 FLX featured in the photo. Any other high quality 40x40x10 mm fan with a 12V 3-pin connector will work as well. Don't forget to connect the fan cable.

Next, replace the original CMOS battery (CR2032 type) as a preventative measure, as the mainboard may have been in a warehouse for eight or more years, causing the original battery to die.