this problem gave me headache I try to restore with itunes several times ,nothing happen same problem restart or reboot can"t charge also ..
i observe the set i put charger then battery percentage about 49percent etch..the phone discharge the battery that y i decide hardware problem...
follow the picture procedure simple triks change flex for charging point....
here same screen shot this procedure tested by me...
how many times already i encounter but not all specialy water damage
here we go follow this..
done.....and note this kind of problem itunes never give u any error 100% restore but the iphone restart or reboot abnormal charging..
gud day...hope this solution can help