iPhone 6 plus - Not turning on!! Help

[boudi_hakerz]

Very important subject


Sent from my iPhone using Tapatalk

[yolmen]

I would plug dc power supply directly to lane and see if something gets hot.
I would also try removing nand and see what the drain on the board.

[czesk20]

I have the same problem with iphone 6.
Initially there was no backlight after slight water damage around LCD connectors.
After cleanup and changing few corroded capacitors phone does not power on and its not detected by itunes.

Similar issue like here: https://www.youtube.com/watch?v=GHw1WX-CC_Y

I have changed PMU ic (U1202) and Tristar ic (U1700) but no difference
I have all voltages OK coming from PMU
I have all voltages present on NAND ic (emmc)

Next I have removed NAND ic and phone is now detected by Itunes.
So I decided first to solder that NAND ic on different working iPhone 6 board
and it was detected by iTunes with this NAND.
Later I soldered it back to my faulty iPhone 6 and phone is back dead not detected by iTunes.

If someone have any idea where is a problem please post it here maybe we can solve it together. I will be trying

[czesk20]

And similar issue here as well: https://www.youtube.com/watch?v=Lp6DXzCxy6M

[ninos22]

Originally Posted by esko1

Hi. I really need help this time. I have iPhone 6 plus from my customer with very important data. iPhone is not powering on. When inserted on charger it draws 0.49A from it. PC won't detect it also.

What I have done so far:

- Changed big power IC (U1202)
- Changed u2 ic (u1700)
- Changed u1401

Checked all caps for short but all ok. No water damage signs also.

Lines that I have tested, and have power:
PP3V0_NAND
PP1V8
PP1V2_NAND_VDDI
PP_VCC_MAIN
PP_CPU
PP_LCM_BL_ANODE

When I got phone, PC was detecting it, but clack screen, then after I remove the shields it wen't completely dead, and this is not first time I have removed it, so that should not be a problem.

Does someone have any advice. I really need help here. Thank in advance

History of phone is very important.

Also have you check for shorts?

[ahmad yousif]

plz post the current on power supply

[czesk20]

Originally Posted by ahmad yousif

plz post the current on power supply

Measurement done with no LCD connected for my not working iphone 6:

1. Battery connected phone switched off consumption is 0 - 0.4mA

2. After power button is pressed phone consumes about 30-40mA
and stays at that level all the time.

3. When phone is connected to iTunes phone consumes about 8-10mA
all the time even after I press power button.
- - - - - - - - - - - - - - - - -- - - - - -- - - - - -- - - - - - - -- - - - --

Measurement done for working iphone 6 with no LCD connected:

Battery connected phone switched off consumption is 0 - 0.4mA

After power button is pressed phone consumes about 80mA
and after about 3-5sec goes to 0mA

When phone is connected to iTunes phone consumes about 300mA
at the beginning later jumps to 1000mA for 2-3 sec I can hear beep
(it mean is detected in iTunes) and goes to 0mA

[Exkurs]

Any news on this? Have the same problem i think https://www.youtube.com/watch?v=DWqQI-gh2FU

[mawaqas]

i think it has something to do with the 2 touch IC's. i have replaced the big one and the amps have improved. ill replace the second one and see if that solves it

[mawaqas]

removing the touch IC's solved nothing but I have just noticed a light short on PP_GPU all caps show 70-80 ohm or faint beep
C1226
C0464
C1210

[zarbourne]

Originally Posted by mawaqas

removing the touch IC's solved nothing but I have just noticed a light short on PP_GPU all caps show 70-80 ohm or faint beep
C1226
C0464
C1210

Keep us updated bro, wpuld like to know how progress is going to add to memory bank lol

[Kradziej]

first of buy bench power supply and cable set for iphones
this is like most important factor to solve any iphone problem
then you can post your problems

[czesk20]

This is OK. I checked and there is low resistance in good phone on those caps PP_GPU line

[hexadecimal]

is problem solved? how is?

[esko1]

Guys check display pmu and backlight ic for short.