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iPhone 4 No reception after screen replacement

throughhymn said:
Can anyone help point to a tutorial or something that explains how to do what chomby did? I too am missing the inductor for my phone but don't know what he's talking about in his solution lol
Click to expand...

When I get a chance I will take the phone apart and show you some photos of what I did.

(btw incase any1 is wondering the repair I performed is still working well to this day)
 
I need help as well. I'm having the same problem with iPhone 4s. I'm cant seem to find where the inductor should be. Pics please...
 
Sorry for the delays guys, here are some shots of the soldering I did. You can see it circled in the second picture. I actually had to extend the wire all the way up near the aerial connection because I accidentally removed that track. Generally you will only have to solder finely on the part which I coloured blue on the third picture which is also the location of the blue inductor [be very careful to make sure you dont solder to the large metal sheilding above it]. Be careful only to solder across where the inductor was, only 2 solder points need bridging. Any questions ask again!

Image1.jpg

(What ive done)

Image-2.jpg

(circled solder/wire)

Image-1.jpg

(blue inductors location and all that usually needs to be soldered across, dont solder onto the small point under the blue)
 
Last edited:
chomby1991 said:
Sorry for the delays guys, here are some shots of the soldering I did. You can see it circled in the second picture. I actually had to extend the wire all the way up near the aerial connection because I accidentally removed that track. Generally you will only have to solder finely on the part which I coloured blue on the third picture which is also the location of the blue inductor. Be careful only to solder across where the inductor was, only 2 solder points need bridging. Any questions ask again!

Image
(What ive done)

Image
(circled solder/wire)

Image
(blue inductors location and all that usually needs to be soldered across, dont solder onto the small point under the blue)
Click to expand...

Do you live in the us
 
Hi Chomby, I just wanted to ask I can't find my blue inductor coil as well. I'm thinking of soldering it my self but have no idea. You mentioned that you don't need to replace the inductor coil so I'm guessing soldering iron it self does the job? Also, I have no gold strip on the top of the motherboard next to the LCD flex cables? Or is my wifi weak due to the inductor coil?

What do you mean by bridging the gap with a flat headed screw driver?


Please could you email as I cannot be bothered with selling this phone just need a working iPhone 4.

Email: suhayl-hussain@hotmail.co.uk
 
Suhayl said:
Hi Chomby, I just wanted to ask I can't find my blue inductor coil as well. I'm thinking of soldering it my self but have no idea. You mentioned that you don't need to replace the inductor coil so I'm guessing soldering iron it self does the job? Also, I have no gold strip on the top of the motherboard next to the LCD flex cables? Or is my wifi weak due to the inductor coil?

What do you mean by bridging the gap with a flat headed screw driver?


Please could you email as I cannot be bothered with selling this phone just need a working iPhone 4.

Email: suhayl-hussain@hotmail.co.uk
Click to expand...

Do you have dropped mobile reception or just a loss of wifi? The inductor only affects mobile reception. What I meant by bridging the gap is that by touching a screwdriver across the two points where the inductor attaches to, it should restore the circuit and show reception. You can disconnect the dock connector cable and still run the phone. whilst doing this check the screen for reception. If reception comes back then this is definately your problem
 
Part

I took apart an iPhone 4s for a screen replacement. After I put it back together I had this part left. Can anyone tell me what it is and where it goes?
 

Attachments

  • iphone piece.jpg
    iphone piece.jpg
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Help :(

Hi Chomby, I need your help please, I did a screen replacement yesterday on an iPhone 4S, when i turned the phone on, all was working except i kept getting "Searching..." where the signal shows.. it was not picking up the Wifi either. the "Searching..." never changed to "No Service", it was like it was stuck on searching. I took the back off, both the cellular and wifi antenna were plugged in correctly, nor damaged. BUT the blue inductor coil fell off (whether I knocked it loose or what, I dont know), I now need the phone sorted asap, can you help at all please. will Soldering across the two points fix this issue??? I need to be 100% certain before I choose the method.
thanks in advance
 
biancaaaa said:
Hi Chomby, I need your help please, I did a screen replacement yesterday on an iPhone 4S, when i turned the phone on, all was working except i kept getting "Searching..." where the signal shows.. it was not picking up the Wifi either. the "Searching..." never changed to "No Service", it was like it was stuck on searching. I took the back off, both the cellular and wifi antenna were plugged in correctly, nor damaged. BUT the blue inductor coil fell off (whether I knocked it loose or what, I dont know), I now need the phone sorted asap, can you help at all please. will Soldering across the two points fix this issue??? I need to be 100% certain before I choose the method.
thanks in advance
Click to expand...

I have no experience with this issue on an iPhone 4s.. I cannot guarantee that this procedure will work as the logic boards are an entirely different beast. Send in some photos of the supposed missing inductors location please, I'll be happy to compare to my 4s board and I might then be able to help
 
hi chompy, i would like your help too. I have a couple of questions regarding the inductor and for the resistor right below the blue inductor. As far as i can see from the image you have uploaded for us, I see that you wired a thin wire through the two spot and that right below the blue inductor there is missing resistor (I guess thats right? :eek: ) alright so here is an image from the web which i circle it (image is just an example) in big circle & small circle, point is i also lost my blue inductor but also the resistor encircle in the small circle. My question is, is it fine that even if that resistor is missing, we just wire the inductor (shown in the image u upload), will it work just fine? What is that resistor so called? What is the purpose of that resistor?

iphone.jpg
[/url][/IMG]

Thanks
 
I too have an iPhone 4S with the same issue. Just did a screen replacement last night and everything went off without a hitch. All screws went back in their proper places and had no issues during the replacement. Phone comes back up with No Service. It recognizes the SIM card, WiFi, Bluetooth, all working. Of course after tons of research on this I see pretty much all the same stuff that is being discussed in this thread. iPhone 4 can be fixed with a simple solder, but I'm wondering if the iPhone 4S can be done the same way. So far, I can't identify on the logic board where you would do that on the 4S. Also, something else interesting that I'm seeing. Not sure if it has to do with anything, but if I attempt to make a call (even with the No Service on my phone), my LCD screen starts to kind of flash a little. Nothing major, just flashes a bunch of times. Made me wonder if something was shorting out somewhere. If someone had information for just the 4S antenna, that would be helpful. Too many people here are getting confused between the 4 and 4S from what I can read. Thanks!
 
jCrust said:
I too have an iPhone 4S with the same issue. Just did a screen replacement last night and everything went off without a hitch. All screws went back in their proper places and had no issues during the replacement. Phone comes back up with No Service. It recognizes the SIM card, WiFi, Bluetooth, all working. Of course after tons of research on this I see pretty much all the same stuff that is being discussed in this thread. iPhone 4 can be fixed with a simple solder, but I'm wondering if the iPhone 4S can be done the same way. So far, I can't identify on the logic board where you would do that on the 4S. Also, something else interesting that I'm seeing. Not sure if it has to do with anything, but if I attempt to make a call (even with the No Service on my phone), my LCD screen starts to kind of flash a little. Nothing major, just flashes a bunch of times. Made me wonder if something was shorting out somewhere. If someone had information for just the 4S antenna, that would be helpful. Too many people here are getting confused between the 4 and 4S from what I can read. Thanks!
Click to expand...

I think your correct that alot of people are confusing the 4 and 4s..

Now I think I can spot a similar inductor on the bottom right hand side of the ip4s logic board about 10mm up-right from where the inductor is on the ip4.. That's where I would check for a missing inductor.

You can reference any high res pic from the net to see where it should be. If there is that same blue inductor missing then my guess would be a drop of solder should work except in the new position, as described in my ip4 solution you might be able to bridge the point with a small flat bladed driver to temporarily restore signal as a diagnostical step. Make sure it's precise and doesn't interfere with other tracks/components.

I haven't performed this on a 4s so can't guarantee it will work. Let us know how you go if you attempt it.
 
agittan said:
hi chompy, i would like your help too. I have a couple of questions regarding the inductor and for the resistor right below the blue inductor. As far as i can see from the image you have uploaded for us, I see that you wired a thin wire through the two spot and that right below the blue inductor there is missing resistor (I guess thats right? :eek: ) alright so here is an image from the web which i circle it (image is just an example) in big circle & small circle, point is i also lost my blue inductor but also the resistor encircle in the small circle. My question is, is it fine that even if that resistor is missing, we just wire the inductor (shown in the image u upload), will it work just fine? What is that resistor so called? What is the purpose of that resistor?

url]


Thanks
Click to expand...

I have no experience with that particular component.

I would fix the inductor the way I suggested then check for functionality, without returned signal you may either have made a poor connection or also need to fix the 'resistor', as per below.

For the 'resistor' I would use a flat bladed driver to try and bridge that gap and see what happens, if signal comes back I would say that soldering should fix. You should see the point It connected easily.

This may only temporarily fix it as having no 'resistor' may somehow degrade the circuit.

To everyone:
I am only Giving my opinions on this forum not endorsing this as a fix. My theory is that the logic board will be stuffed if you leave it so you might as well give it a shot. I do suggest however that if you aren't competent about soldering get someone else to do it.
 
Hi, I did it with my iPhone 4g is working 100% but now I have same problem with my iPhone 4s any help?? any pic to see??

thank u
 
Thanks a lot Chomby and the thread starter. I am wondering if it's save to use a 40 w soldering iron? What wattage of iron did you use Chomby? Also, did you touch the circuit with your iron or did you just let the solder drip?

1 more question. Is the whole piece solder? Or was there a small wire you installed?
 
OmarAl said:
Thanks a lot Chomby and the thread starter. I am wondering if it's save to use a 40 w soldering iron? What wattage of iron did you use Chomby? Also, did you touch the circuit with your iron or did you just let the solder drip?

1 more question. Is the whole piece solder? Or was there a small wire you installed?
Click to expand...

I had to install some wire because I accidentally took some of the circuit track off. 40w will be fine and you should be able to just dab it on. Letting it drip might get messy. Make sure your tip is fine enough to get into it. I would recommend removing the board so that you don't touch the dock connector etc
 
hi chompy, this is how i did my soldering, but I still dont receive any network or sign of progress....
Here is a click after i have soldered it, is it correct or am I missing something?
Sorry for the trouble...:D
ie2la.jpg
[/url][/IMG]

can someone here plz... gimme a pic of ur modification please...... :)
 
agittan said:
hi chompy, this is how i did my soldering, but I still dont receive any network or sign of progress....
Here is a click after i have soldered it, is it correct or am I missing something?
Sorry for the trouble...:D
url]


can someone here plz... gimme a pic of ur modification please...... :)
Click to expand...

I dont know if its because of the blurry image but that looks very messy to me. i dare say you might have soldered onto the metal shield in the process which would result in no signal. Just to be sure, did you try to bridge a connection before soldering?
 
Film on a new backplate

I just got a new backplate that came with a small bit of film over the metal sliver where the contact clip makes contact to the backplate. That film wasn't present on two other replacement backs I've purchased. After taking that stupid film off, reception was, of course, immediate.

It took me a while to think to scrape my finger over that spot.
 
After i replaced mu speaker i am also having 3g reception problem for verizon! What kind of soldering tool do i need since its so small indont want to mess up!! Plz help!
 
question

chomby1991 said:
Ive just had this issue, I replaced the screen and my reception dropped to no service. In ifixit, it explains in one of the steps to make sure you didn't lose the little blue inductor to the bottom left of the aerial cable. In my case this was missing. With the back off the phone i used a flat bladed screw driver to bridge the gap between the 2 solder points where the inductor was and this brought back signal immediately hence proving that this was in fact the problem, We used a bit of solder and a steady hand to join the gap and it now works perfectly fine again. The quality of phone calls seems to be the same if not better.

During the installation of the new screen i did not touch that inductor at all, nor have any heavy bumping of the logic board so it appears this inductor is very poorly soldered in at the factory.

I suggest that if your having this reception loss issue that you take the back off with the phone still on and try to bridge the gap left where the inductor used to be by lifting up the L shaped ribbon on the bottom left hand corner and using a flat bladed screw driver as said before, if thats your problem a bit of solder in the capable hands of someone experienced should have you out of trouble. If anyone wants help with this pm me. (take the logic board out to avoid damage to the dock/speaker assembly.
Click to expand...

Hi there I'm another user with the same problem, can u possible describe or send me a pic of that little part that need to be fix, cause I can't figure out where it is. Like many other users I completly desamble and resamble it but with this issue, so please can u send me a pic or give me an extended descrition of how to get there and how to fix it? I will apreciate it.
 
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