Rep: 243
6
22
Hi Guys. I have an iphone 6, i think with touch IC problem, because sometimes, the touch screen not work.
I desolder both touch IC's.
And now the iphone dont turn on.
I check with multimeter all caps (vcc main) are short.
I dont desolder any EMI Shield.
Any suggestion plz ??
Thanks
Is this a good question?
Rep: 14.9k
8
29
40
Umar, If it was working fine and all you have done is removed the Meson and cumulus and now you have a VCC_Main short... Check the surrounding Caps in the photo to see if you may have bridged one of them.
The only other 2 IC's are the PMIC (Near Cumulus) and U5302 (NFC IC). If all of the caps are fine, I would start with the U5302 if you bumped it because there are ground pads right next to the VCC Main...Unless you bumped the audio IC backwards trying to get at Meson, but there are only 2 VCC Pads...
Best of luck!
Was this answer helpful?
Hi Michael.. Thanks a lot for suggestion. Unfortunaly i read lata your message and begin to desoldering PMIC. Infect the porblem is in U5302 :( :(
Today i will try to resolder these 2 IC's and let you know something.
Thanks again.
HI Michael. I try to resolder PMIC and NFC IC. but the iphone dont turn on.
If i try to connect it with DC Power Supply (with PMIC On the board) DC power begins to beep. If i desolder the PMIC and connect it to DC power, dont beep. Do u think the problem is on PMIC??? may be i dont soldering it correctly?? I tried IC position is correct. Thanks
If the DC power supply you have gives an audible for shorts, then most likely you have bridged something. First....did the VCC_Main short go away after removing it? or did you say it went away after removing NFC? If you have the NFC put back on and there is no short with PMIC off, then yes, I would think getting the PMIC back on as carefully as possible...remember, the CPU is right under it and do not want to create too much heat to cause an issue there.
Past 24 Hours: 0
Past 7 Days: 0
Past 30 Days: 2
All Time: 3,929
