ONE macbook (running 10.6.8) cannot detect wireless printers

Recently replaced routers at our school, all is fine except ONE macbook (running 10.6.8) cannot detect wireless printers, all other laptops (mac/pc) have no issues detecting the printers wirelessly and print fine. I am thinking this is something about the network settings on this particular computer but I have been comparing the settings with my macbook pro and they seem to be identical. Does anyone have any suggestions I could try? Thanks!