iPhone Hardware problems in one thread

[derick5]

Originally Posted by kali_fuchi

before rehot wifi chip,check wifi antena connector near front camera,also check ground connector near lcd connector

Thanks Kali_fuchi.

I have been swithed the bad motherboard to a working iphone4, after that, it still has the same problem.

Which one may cost this problem? and how can I find it out? point on the picture will more helpful.

Thanks,

Derick

[Star Net]

Hi Mr. wites..

thanks for such a nice thread...

I have 4g, factory unlocked.. all well.. but wen i make a call, after 5 seconds.. phone is hung.. need to pull out battery then... its goes on...

what is problem.. and how to fix it..

Thanks in advance...

[mustafa_180]

Guys i have a iphone4 its wifi signal is wick have any solution for that .
BR.

[ttkirst]

Hi Wites,

I checked everything and couldn't find a solution. the only thing I could find wrong were the voltages as in the picture attached. Could you have a look at it and tell me what you thing? PMU???

Thanks in advance!

kind regards,
Tyler

[air_chair256]

Originally Posted by ttkirst

Hi Wites,

I checked everything and couldn't find a solution. the only thing I could find wrong were the voltages as in the picture attached. Could you have a look at it and tell me what you thing? PMU???

Thanks in advance!

kind regards,
Tyler

hi bro do you have iphone 4s schematic?

[slave2anubis]

Originally Posted by Wites

1.try other USB cable,or charger.
2.Replace dock flex connector.
3.Replace this diode marked with red.
4.Reball/Replace PMIC.

Hi.
I have studied the 3g and 3gs schematics and found out that this "D1" is responsible for some charging problems... i want to say that this diode is not a simple diode and from the symbol its a zenner diode, the problem is what voltage dose it have? or is the symbol missplaced and its a normal diode? i found out that the 3g dose not use the same parts as the 3gs, the diode is missing from the "PWR1000" bus, instead you can find a similar diode o other power supply bus like "PWR500 RF" i wonder if i cand replace the "D1" with a normal diode (1n1004) or is it a ultra fast shotky diode?
I am tryng to repair "charging not...." on a 3gs!

[ramezwy5]

good after noon everyone
I've iPhone 3gs 16 gb
the main problem is it doesn't give " no sim card installed" , instead of that it gives no service.
please help.
thanks

[Burnt Cobba]

Originally Posted by ramezwy5

good after noon everyone
I've iPhone 3gs 16 gb
the main problem is it doesn't give " no sim card installed" , instead of that it gives no service.
please help.
thanks

It could be many things.Assuming the sim card is working, check:-

1. Not black listed
2. The pin on the bottom right is not snapped. Also check the component near it that it is not missing
3. What happens if you go into setting -> airplane mode (switch to on and then to off)? Does it show the word searching for a few seconds or not?

[gianfix]

error 21 iphone 3g 16gb water damage:
Hi boy,
I have a problem.
My iphone 3g is water damage.
I have cleaned the logic board with ultrasonic cleaner and I have changed all component into a cover (connector dock, display, flex cable ecc..)
When I restore the ios 4.1 original the iphone turn on, and the display stays all white and itunes give me error 21.
Please help me my friend.
Must appreciated if you can upload photo solution.
Thank you so much

[rhin_o2]

Originally Posted by grim_repoo

Someone have ideea, an 3g with sound problems. I can't hear in earpiece, speaker and the mic is not working. When i try to attach headphones it don't recognize them. Please help

hardware problem. you can change the audio ic on the main board.

[harish1717]

iphone 4s Headphone mode problem plz any solution



thanx

[ui_comm]

IP 4S after water damage fake charging.

Any solution thank.

[tayfunuzun]

iphone 4s touch sometimes different works.
I try touc ic and connector but did not improve.
Do you have any idea??

[zyztema]

I have an iPhone 4S always "Searching...". This happened after I changed LCD and digitizer screen. I don't know what I did wrong, because I work on this and I change almost 5 screens per day. I'm not an expert, but I checked logic board and compared it with another 4S logic board and looks equals, nothin

[ramezwy5]

Originally Posted by Burnt Cobba

It could be many things.Assuming the sim card is working, check:-

1. Not black listed
2. The pin on the bottom right is not snapped. Also check the component near it that it is not missing
3. What happens if you go into setting -> airplane mode (switch to on and then to off)? Does it show the word searching for a few seconds or not?

thanks for your help.
I try the last one and it searching forever.
the network not available , carrier 12.0
I using simple mobile, the other iphone carrier is 9.0 and it works good ????