iPHone 4s boot loop with logo - battery not recgnized
 

HI, I have iphone 4s that:
1. only powers on fine when plugged into wall outlet.
2. does a boot loop with logo when plugged into the usb port on pc. Not recognized by iTunes. when this happens, I do a reset holding down power and home button. i get the connect to pc icon on phone, but then iTunes sees it for a second as I try to restore device, once it begins to access the device, it fails with 2001 error. Then back to boot loop with logo.

I looked under microscope and it seems the diodes and the battery connector are on pretty solid.

3. battery is fine. I have 3 good ones i used to test.

Can you help?

bro what is the history of ur device? is these water damage before?
and check also the battery connector with ur tester if shorted or not

yes water damage.
I checked the battery connector - I checked and there was continuity from the pins to the 4 diodes as per a schematic I saw.... What can I check next? the logic board gets very hot during boot loop.
Thanks

First check short between + and - on battery connector.

I checked between pin 1 and 4 on the battery connector J9 and there is continuity, so that is bad, what can I try next?
Thanks for helping.

Is it shorted?? 0 ohm??

multimeter set on beep continuity test, OHM reading showing 007 with beep.

I tested with good 4s board showing no beep and 1505 in ohm setting.

is this right? please help with next thing to try with multimeter and I have schematics, thanks.

I just noticed the logic board is missing:
DZ7, C152 and R105
would this cause problem?

Thanks

clean and brush it with dish washing liquid in the water , but make sure that u remove all the metal cover before u do the cleaning process and dry it using hot air or ****er and also check this area if found rusty or something corroded remove this capcitor and clean it

http://i1288.photobucket.com/albums/...psedpzvsol.jpg

Bro this is iPhone 4, we are talking about iPhone 4S. :confused:

Nope, your motherboard is shorted. Search this forum for 4S shorted solution. :)

sorry guys ,,, for the last picture that i was posted,,,

bro check this hope it can help u gudluck

http://i1288.photobucket.com/albums/...ps01f94b30.jpg

i have same problem with 2 iphones 4s and tried ur solution removed 2 diods and same problem any other suggestion please ?