Thank for your reply, I restored fresh (DFU) several times and tested with SIM's from different carriers (all connected with perfect signal and I was able to make calls), but problem persists. The phone is in very good condition, never dropped - all parts original.
Could it bee the PMIC that is unstable ?

plz help us in 3gs reboot auto in 5 or 1 mints whats fault

Typical problem the battery is high copy and not original. Replace with APN 616-0435 battery or else the watchdog daemon will report the non-conformity and will restart the phone every 1-5 mins.

help me!:confused: where is the IC touch control 4s ! i have 4s touch problem !
thanks

come on please.. can anyone help me? or just simple reply would be appriciated..
thx

Just want to thank the solution of Sir Wites. I have an iPhone3g Water damaged after reheating mainboard it gives me white screen. By following this solution i got a display. Holy mother you are a savior to us.

Request to stick your thread. And we will support you.

iphone3g white lcd
 

My iphone 3g white lcd problem lcd jack& lcd change but same problem plz help me post date 22/2/2012plz help me very nxerjant tha

thanks you very much ,, nice bro.

Wauuuuuu, красава!!!!
without trafaret!!!!
I need to try this metod too and of course listening Jean michele Jarre))))
круто)))))

I have a 2g iphone with the battery pads have been lifted off the board, i was wondering if you could help me with jumper points to attach the lead to so i can back up the data. thanks, Steven

I have a iPhone 3GS 4.1 bb 6.15 and I wanted to upgrade it to 5.0.1, so I made a custom ipsw with snowbreeze and restored my iphone via itunes with this custom ipsw (so I can unlock it after the restore) , after the restore my screen just went black and my iPhone dont want to boot up anymore... and itunes always recognizes my iphone and says it needs to restore, but when I try to restore it again it gives me error 1600 even if it is already in pwned dfu mode with redsnow...I also tryed to get pwned dfu mode with iReb or snowbreeze but its always the same
please help me out dude, i really need my iPhone back...

i don't think its a hardware problem, try installing 4.1 and after jailbreak reinstall iPad base-band and check with ultrasnow,after that if its working you can upgrade the phone with noBB custom FW, in my case i upgraded 3gs with 5.0.1(stock FW)it started searching without SIM, if we do so it corrupts the base band.

iphone 3gs completely dead
 

Hi to all guys... i have a problem with an iphone 3Gs that is completely dead, i don't know very well the story of these iphone but i notice that on backside there was a burned filter on LCD circuit (the same mentioned by whites in these circuit solution at the right downside corner, sorry but i haven't got the microscope to take picture in these period), i removed burned filter and i jumpered it.

After I check voltages on PMIC and these's the result, there's a line of capacitors and the coil that should be at 1.0V but tester give me 0V. Should i make the reballing of PMIC?

Check L11 coil if beep or not short to gnd,possible PMIC burn you look in schematic how that filter is connected.

Thanks white...i haven't got any detailed circuit schematic however i check all the coil and the only one that have a very low resistance to GND is the L9_AP