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Quan Lin
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Why "No Service" after replacing LCD screen?
Just replaced a broken screen and now the phone says "No Service". It detects the sim card and I was able to go into home screen after inserting sim card and plugging into iTunes. But it does not detect any service networks. It says "Searching...." then goes to "No Service"
There might be a few screws that aren't exactly the right size and I've tried switching some of them to no avail. I am sure the screw for the battery connector is correct.
I am told the antenna is connected via screws?
Any help would be appreciated.
Thanks!
Edited by: oldturkey03 ( )
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Accepted Answer
I found the solution!!! I too replaced a digitizer on my iPhone 4 only to put it back together and find "no service". From the silver connector, trace the circuit towards what looks like a copper connector of the same type. In between the two male connectors I am mentioning is a very very small resistor. It is either blue or purple in color, or is probably missing already. If not, bump it with a screwdriver and see if it moves. I spent 10 hours finding this out. I tapped it and it fell off. I joined the connection points together with a low temp solider and got full 3G service!
dirtroadbuilder
Ok this isn't the exact site I used back then but it is the same solution I used to the same problem. Here they are calling it an inductor. I didn't replace it however I just jumped the circuit as this thing is ridiculously small. On the 4, take the motherboard out and follow the circuit to the left of where the silver connector attaches. It is not quite half way to what looks to be a gold connector exactly like the silver one. Right there just below the metal guard you will either see a gap in the circuit or a resistor that may be broken off by the previous removal process. Here is the link to what it is on a 3G. http://www.mauron.net/iphonerepair/
Of course I will gladly check this out for you and repair as necessary. $75 plus shipping for a successful repair, $25 plus shipping only for an unsuccessful attempt. I mainly do screens for people. $50 for 3G, $60 for 3GS, $150 for 4g as you need to replace LCD and glass digitizer at the same time. Email me at dirtroadbuilder
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gareth williams
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Answered
i have found the problem :)
the little silver connector which most people think is for the speakers is actually for the antenna, its the thing under the battery plate (the first thing you unscrew when you disassemble the iphone )
IT HAS NOT CLICKED IN PROPERLY !
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An Nguyen
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After you check all the silver connector and still no service then you need to check this out
[[IMG]http://i1130.photobucket.com/albums/m527...[/IMG]]
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dangerdawg
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After tirelessly tearing the phone apart and reconnecting anything that may have been loose and cleaning all metal contact points, bridging the connection points of the missing blue resistor did the trick immediately ! It must get nicked off easily trying to reconnect this sometimes difficult antenna connector. I used a Craig Circuit Pen to drop a dot of the conductive liquid to bridge between the old resistor points, rebooted phone and had 3 + bars of 3G service !
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jmansson77
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Jamie Horn
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There's about 4 ways I found you can solve this problem.
Before a repair, take back off and follow steps up to and including the dock connector flex cable peeling back enough to see the "blue inductor coil" if present, continue repair.
Make sure that logic board is seated 100% correctly and that the speaker assembly has all 4 metal clips under the metal bezel.
Then make sure that the antenna cable is clicked on properly but be very gentle with it, try not to bed and push down lightly with spudger.
Make sure metal bracket is seated correctly under battery connector to ensure it makes contact with the back plate you put back on.
Hopefully this helps some people :)
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I will put pictures up in approximately 9 hours. I tried to take photos with my work phone (samsung rugby) and Bluetooth them to my iPhone 4 but will not pair. The only reason I know this problem could happen is from iphone 3's I have done. What I can do is provide a link to that website to help get you in the right frame of mind. Also I do not know what the resistor is used for and why it works with the circuit bypassed, it just does. I have two 3g's with this bypassed and have been working just fine for a year now with no issues. It might might use more battery, but it's only been a day and I could just be paranoid. My next post will be the link if I can find it.
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hi i have the same error than you i change the screen assambly of the 4g because my friend wet the screen and the screen goes without backlight and i change it but when i turn on the phone show a one little signal bar and then says Searching and then No Service i check the 2 solder contacts the says in this web but that's all right but i cant get signal form att any one issue or something thanks
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joe
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i took my iphone 4 apart and put it back together like it is supposed to be. i made sure the connections were all connected but still no sim installed..this is very frustrating! any answers as to what i may have done wrong??
i am having the same problem. but i put the screwdriver in between the side of the phone and the mother board and got full service. its very touchy though and anytime it gets dropped or hit it says no service and i have to take the back plate off and re position the motherboard. did any of you guys have this problem and have you found a permanent solution for it??
joe,
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I had the same problem,. I have an Iphone 4 running on IOS 4.1 & 2.10.04 Baseband, I could unlock using Gevey / Gevey Plus or Gevey Ultra, but I always showed up as NO SERVICE.
BRIDGING THE TWO DOTS WHERE THE INDUCTOR SHOULD HAVE BEEN SOLVED THE PROBLEM.
Now I have a unlocked phone and FULL SIGNAL BARS not even a single drop with 3G.
Now I have upgraded the IOS to 5.1.1 preserving the baseband and I'm still able to unlock the phone, with an exception that the signal bar now only shows 1 bar, but I know that it's only a cosmetic issue, in real the bars are full.
If you have an old Basebane like mine, and are on a newer IOS, the phone will show only 1 bar while it's on full.
They say there is a way around this, by installing Ultrasn0w, but I've tried that, and while it solves the cosmetic problem for some, it did not solve mine.
I'm happy with my unlocked Iphone 4.
THANK YOU TO ALL THE TECHIES WHO CAME OUT WITH THIS SOLUTIONS.
Aj.
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Eric
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sarah
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Do you have the new IOS6 update???
If so, just use another phone to call your mobile. Not sure why this works but i haved now repaired 6 4s with this new update and after i repaired them they all had the searching come up, now i just call the number and it kinda like resets the reception.
hope this helps
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You can use a circuit writer pen to connect those to points. Circuit writer pen can be bought at Fry's Electronics or at Radioshack. Take your time by practicing on paper to get a perfect small dot.
Follow the picture above.
Edited by: oldturkey03 ( )
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[ I have read in some forums it helps to set the date and time.....
If the battery have been disconected the time and date is wrong and there will be a "searching issue".
Tried it on my friends 4s and it worked!
/Jens ]
I just can't believe that it works ! I was going crazy about an iPhone 4 (not 4S) I'm sure that my work was perfect !
Everyone getting this issue should TRY THIS FIRST !
Thanks Jmansson !
The circuit board is faulty. That is the answer.
Quan Lin,