hey nobody wants to belittle you or make you feel unwelcome dont take wrong way!!!the docking port is similar on 4 and 4s - the cap he is referring to is c227,- keep in mind you dont remove that cap if its not shorted or if its in range(27pF)- its the cap associated with the home/menu key , sometimes when it shorts you get 16xx errors but first change the dock port/battery assuming its hardware related (software related 16xx/21 errors could be jailbroken/ hacktivated firmware yadayada). There is also a diode in the ipn4 which may be bad, but in 4s, also check resistor 57 its near u8 (under the a5chip ) which is he logicbuffer pre pulldown for the pp1v8 (powerline)for the home/power key |