N-Gage keypad problem n shorting
 

Dear senior..I got problem with N-gage. Four keys doesnt work *, #, pencil n and a key next to it.i've changed the keypad jeck and i also do jumper but it doesnt work. I expect it must be the cpu faulty and 1 more thing i found the board shorting that makes the phone failed to boot normally. Plz, I really really need help me