Hi im wondering if you

Question

hi im wondering if you could help me i have a samsung syncmaster 713bm and it wont work with my pc because the person who i bouth it off was running it thro dvi monitor to pc lead and i want to run it thro rgb and it wont let me he sayes he read up about it on internet and it sayes that i have to restore my monitor to factory settings and i was wondering if u could help me on how to do that thanks foryour time