The manual lists which AMD processors are compatible. For the N15235, the max supported CPU is usually the AMD Athlon 64 X2 6400+ (125W). Do not install a Phenom CPU—it will not work.
Foxconn no longer hosts direct downloads for many legacy products, but the community and third-party archives maintain copies. Here is the recommended approach to find a safe, virus-free PDF: Foxconn N15235 Motherboard Manual Pdf
The most common reason people need the manual is to connect the case wires. The N15235 uses a standard 9-pin header (F_PANEL). Without the manual, you short the wrong pins. The correct pinout is usually: The manual lists which AMD processors are compatible
Foxconn’s old support portal used the URL: http://www.foxconnchannel.com/Support.aspx
Use the Wayback Machine (archive.org) to fetch the PDF from 2010-2012 era snapshots. Foxconn no longer hosts direct downloads for many
If the PDF is truly lost, you can still work with the Foxconn N15235 using these manual-less techniques: