The only cable that I see is on the other side of the roller and it is connected to another wire and no magnet is visible according to the image up The only cable that I see is on the other side of the roller and it is connected to another wire and no magnet is visible according to the image up

you must see the owner manual. download from www.fitness.manualsonline.com for to locate it.By tighting I mean to secure very well and cleant with solvent contacts. The connector is coming from display board and the lower connector to the boards. The ribbon cable is inside from display board you must open. And the magnet you must see the owner manual. See if your system has batteries, it has open it, replace it, and clean it the spring contacts. with contact cleaner Merry Christimas. you must see the owner manual. download from www.fitness.manualsonline.com for to locate it.By tighting I mean to secure very well and cleant with solvent contacts. The connector is coming from display board and the lower connector to the boards. The ribbon cable is inside from display board you must open. And the magnet you must see the owner manual. See if your system has batteries, it has open it, replace it, and clean it the spring contacts. with contact cleaner Merry Christimas.