Can't resolve itunes error 21 for restore.
iPhone 4s 16 GB Verizon model a1387
firstly the iPhone suffered a drop in water. took precautions to eliminate moisture placed it in bag of rice.
after 48hrs i tried turning it on. it would not turn on. i plugged it into my pc (windows 7 ultimate 64 bit version) and turned it on.
the phone was stuck on the apple logo screen i than initiated DFU mode to restore the phone. and well the phone was verifying software for the restore the iPhone screen went black and my PC made the sound as though the USB port was unplugged than the same sound occurred and the iPhone went back to the connect to iTunes screen and then the iTunes window popped up saying error 21 occurred.
I followed all support info on apple.com/support with no change in error code. 21
How i Troubleshooted:
1. i tried it on multiple computers and a mac, same code 21.
2. plugged the phone into wall and no charging symbol comes up just the plug into iTunes screen.
3. unplugged it from charger several hours later and attempt to turn on iPhone. it did not power up.
I believe the battery may have gone bad from the incident. i did note there is a light char mark on sim tray but no charring on sim itself.
is there any other way to test if its battery or not?
does the general populous agree with my thoughts?