iPhone 4 - No Service No Signal - Capacitor and antenna problem? - GSM-Forum

AceDK · 10-27-2012, 23:04

Hi to all,

this is my first post here. I heard about this forum on another website...that hear are professionals and they could help me maybe.
So my problem...i have bought an used iPhone 4 which is factory unlocked and jailbreaked. When i put my sim card inside i can use
WIFI without problems, but i don't get phone signal...always searching and no signal - no service.

So i decided to open the phone, and look...

- i see a broken signal antenna which was not connected anymore (I will buy a new one and replace it)
- the battery bracket connector was not there - somebody removed it and lost (I will buy a new one and replace it)
- i don't see the small blue capacitor-coil...and there shold be another small capacitor (smd)...look at the picture (?????)

Picture: http://oi46.tinypic.com/n532i8.jpg

Can somebody tell me if this is normal that there is no capacitor near the antenna connection? I looked on other pictures of iphone logic boards and
saw, that they have a small blue capacitor there and also another one capacitor, which is same size but not blue.
Should i buy new smd capacitors and solder on the board or? What are the suggestions...and what type of capacitor is this...what mode, how many V and what capacity in uF?

Thank you guys for your help in advance!

ps3xbox · 10-27-2012, 23:36

simple problem replace the blue inductor and the capacitor(the cap is needed only for signal resonance smoohing-not life threatning)

backbiter17 · 10-28-2012, 07:34

check replay on other forums you posted your problem

wbr,A

AceDK · 10-28-2012, 15:08

Thanks for the Answers guys...but...

what kind of blue inductor is this? What model, type name...or how and where can i buy this except ****? I belive it's a normal inductor with blue color, or? And what kind of cap is the small one near the blue inductor?

@backbiter17: thanks for the answer in the other forum. It's also good to post all information here, if somebody after will need it.

reserve · 10-28-2012, 15:14

Quote:

Originally Posted by AceDK

Thanks for the Answers guys...but...

what kind of blue inductor is this? What model, type name...or how and where can i buy this except ****? I belive it's a normal inductor with blue color, or? And what kind of cap is the small one near the blue inductor?

@backbiter17: thanks for the answer in the other forum. It's also good to post all information here, if somebody after will need it.

Old plate and take it to take off and put on your do not buy it all brother...

ps3xbox · 10-28-2012, 17:26

Quote:

Originally Posted by AceDK

Thanks for the Answers guys...but...

what kind of blue inductor is this? What model, type name...or how and where can i buy this except ****? I belive it's a normal inductor with blue color, or? And what kind of cap is the small one near the blue inductor?

@backbiter17: thanks for the answer in the other forum. It's also good to post all information here, if somebody after will need it.

iPhone 4 - CyberDocLLC.com Your Repair Solution for iPhone, iPod , iPad and Apple Prodcuts

costs 5 dollars only!!lol best to order from here cuz digikey wants a min of like 500 inductors...4.3nH 03015 size..hardtofind

the cap is
1.00pf +/-0.1PF 25V
COG type 0201

air_chair256 · 10-28-2012, 19:53

you can make jumper for this coil anyway if you lost this coil you must have 1 point signal but now you try and make jumper for this coil and search manual check if it find any network or no and be careful dont give it to much heat because its near from bb ic if you give it to much heat you will lose the IMEI

AceDK · 10-28-2012, 21:57

@Tommyservice - Thanks. I have some computer motherboards...could take it from there, but im little afraid i don't have that much experience to do this...and also not the prober tools. Maybe i can buy a small heatgun to solder smd's and watch some tutorials on youtube...

@ps3xbox - Thanks for this information. This is very helpfull. I have to decide if i order more, and sell the other after or just buy one

@air_chair256 - Thanks for this advice. Do you have a tutorial somewhere, where i can have a look how to do this?

AceDK · 12-02-2012, 22:00

Hi to all

1. I did replace the antenna cable
2. I just solder a bridge between the two spots - where the blue coil should be

and the signal is working now. Thanks to everybody

noobfix · 12-03-2012, 00:33

CyberDocLLC iPhone 4 4G 4S 4GS No / weak GSM Signal fix Blue Inductor Coil replacement Repair

peekum85 · 07-04-2013, 07:10

iPhone 4 - No Service No Signal

Hi to all..!
Same Problem . I have used iPhone 4 which is factory unlocked. When i put my sim card inside i can use WIFI without problems, but i don't get phone signal...always searching and no signal - no service.

So i open the phone all components are fine. when I checked the phone, while power on, near battery connector area getting small heat..

what can i do..

Thanks.

10-27-2012, 23:04	#1 (permalink)
AceDK Junior Member Join Date: Oct 2012 Location: Slovenia Posts: 5 Member: 1831480 Status: Offline Thanks Meter: 0	iPhone 4 - No Service No Signal - Capacitor and antenna problem? Hi to all, this is my first post here. I heard about this forum on another website...that hear are professionals and they could help me maybe. So my problem...i have bought an used iPhone 4 which is factory unlocked and jailbreaked. When i put my sim card inside i can use WIFI without problems, but i don't get phone signal...always searching and no signal - no service. So i decided to open the phone, and look... - i see a broken signal antenna which was not connected anymore (I will buy a new one and replace it) - the battery bracket connector was not there - somebody removed it and lost (I will buy a new one and replace it) - i don't see the small blue capacitor-coil...and there shold be another small capacitor (smd)...look at the picture (?????) Picture: http://oi46.tinypic.com/n532i8.jpg Can somebody tell me if this is normal that there is no capacitor near the antenna connection? I looked on other pictures of iphone logic boards and saw, that they have a small blue capacitor there and also another one capacitor, which is same size but not blue. Should i buy new smd capacitors and solder on the board or? What are the suggestions...and what type of capacitor is this...what mode, how many V and what capacity in uF? Thank you guys for your help in advance!

10-28-2012, 07:34	#3 (permalink)
backbiter17 No Life Poster Join Date: Jan 2004 Location: SLOVENIA, LJUBLJANA Age: 55 Posts: 1,155 Member: 48933 Status: Offline Thanks Meter: 104	check replay on other forums you posted your problem wbr,A

10-28-2012, 15:08	#4 (permalink)
AceDK Junior Member Join Date: Oct 2012 Location: Slovenia Posts: 5 Member: 1831480 Status: Offline Thanks Meter: 0	Thanks for the Answers guys...but... what kind of blue inductor is this? What model, type name...or how and where can i buy this except ****? I belive it's a normal inductor with blue color, or? And what kind of cap is the small one near the blue inductor? @backbiter17: thanks for the answer in the other forum. It's also good to post all information here, if somebody after will need it.

10-28-2012, 19:53	#7 (permalink)
air_chair256 Freak Poster Join Date: Oct 2011 Posts: 338 Member: 1679608 Status: Offline Thanks Meter: 190	you can make jumper for this coil anyway if you lost this coil you must have 1 point signal but now you try and make jumper for this coil and search manual check if it find any network or no and be careful dont give it to much heat because its near from bb ic if you give it to much heat you will lose the IMEI

10-28-2012, 21:57	#8 (permalink)
AceDK Junior Member Join Date: Oct 2012 Location: Slovenia Posts: 5 Member: 1831480 Status: Offline Thanks Meter: 0	@Tommyservice - Thanks. I have some computer motherboards...could take it from there, but im little afraid i don't have that much experience to do this...and also not the prober tools. Maybe i can buy a small heatgun to solder smd's and watch some tutorials on youtube... @ps3xbox - Thanks for this information. This is very helpfull. I have to decide if i order more, and sell the other after or just buy one @air_chair256 - Thanks for this advice. Do you have a tutorial somewhere, where i can have a look how to do this?

12-02-2012, 22:00	#9 (permalink)
AceDK Junior Member Join Date: Oct 2012 Location: Slovenia Posts: 5 Member: 1831480 Status: Offline Thanks Meter: 0	Hi to all 1. I did replace the antenna cable 2. I just solder a bridge between the two spots - where the blue coil should be and the signal is working now. Thanks to everybody

12-03-2012, 00:33	#10 (permalink)
noobfix Banned Join Date: Mar 2012 Posts: 317 Member: 1738165 Status: Offline Thanks Meter: 206	CyberDocLLC iPhone 4 4G 4S 4GS No / weak GSM Signal fix Blue Inductor Coil replacement Repair

07-04-2013, 07:10	#11 (permalink)
peekum85 Junior Member Join Date: Jan 2008 Location: colombo Posts: 11 Member: 688532 Status: Offline Thanks Meter: 0	iPhone 4 - No Service No Signal Hi to all..! Same Problem . I have used iPhone 4 which is factory unlocked. When i put my sim card inside i can use WIFI without problems, but i don't get phone signal...always searching and no signal - no service. So i open the phone all components are fine. when I checked the phone, while power on, near battery connector area getting small heat.. what can i do.. Thanks.