Chosen Solution
Ok so this person asked me to fix their iphone 4s because it would only work when plugging it into the computer. However I later discovered that the connection from the FPC battery connector onto the logic board had been broken off and one of the connections is completely broken off and I can take it right off the board. I was wondering if anyone had the best way to approach this problem. I have some soldering background and if that is needed I would be able to do so.
Ralph, sure looks like it has seen better days. I would try and change the battery ways. check the attached image for the routing. this will of course only work if all your other components are still functioning. Hope this helps, good luck.
all this is not neccecery !! i had same problem but just put some pressure on it vith a sim card i cut out and put on top,then bit the phone assambled it put pressure on the connections,i actualy am not sure they were ever solded,benefits is also that with good conection now it last power more days!!!!