Hello... I was experiencing problems with battery drain and overheating on a 5s, I was informed the U2 IC was in need of...

The problem here could be a faulty baseband IC, the phone usually goes into "searching" with this fault and is unable to find a mobile network, to further check whether this is the fault, more often than not the modem firmware number (which you can find in settings > about) , is blank To fix this problem, it can be done by reflowing the IC, but as with any reflow, the fix is never guaranteed to be a permanent 1, the best fix is to have it removed and reballed (new solder applied)

I know this is old but I am having the same problem, solder pads 2,3 &4 missing from the battery connector Can you double check your post please Turkey,.. or the schematics at least, in the picture it has pin 4 going to ground but I have just got my hands on some schematics and from my understanding pin 4 goes to C294 aswell as ground From my understanding I need to make jumpers as pictured in my upload ? We've spoke before via email, I was asking you for advice, not really done any board work since then, this is the 1st "big job" in a long time, any help much appreciated as always Update (06/15/2016): forgot to put the picture in