iPhone 4

Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White.

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No Signal - No Service - No Capacitor - Motherboard picture

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 [/B]

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!

Answer this question I have this problem too

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Hi, I think those are coupling capacitors, try any value from 1nf. I could be wrong but I think it is one of those. Write back what you did. Good luck.

by John Savio

Hello John! Did it work? Did you resolve the signal problem (no service)?

by Sebastian

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Please check the image:

Block Image

Red :This is the antenna.You have to change it.

Blue : The antenna connector.Try to repear it somehow or just change it.

Yellow: Just make a bridge between this two points.

It should work :)

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Hi Mustafa,

thank you very much for your help. I ordered a new antenna.

When it will arrive, i will replace it an try to connect this two points.

You have any idea what to use for cennecting this two points?

Soldering wire or a small cable?


by Ace

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You have to solder thin cable like in the pic:

Block Image

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Depending on your soldering skills you could also use liquid silver. It is really easy to apply and is made for situations like this. I often do iPhone repairs and find this very usefull. But keep in mind that this stuff is more expensive then soldering, i paid €30,- for it.

Good luck

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this is a very simply repair if one knows how to. simply run a small wire from the left side of the antenna to the far left antenna bridging it across the blue coil and hey presto! signal works again!

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Hi to all :)

Many thanks to everybody for all your answers and help.

1. I ordered a new antenna and replaced it

2. I just straightened antenna connector a little bit

3. I did solder a bridge - where the blue coil should be located

And the signal is there. Great...but i see now the wifi signal get worse, then before...hmmm.

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Hola soy de Argentina y tengo el mismo problema! adquiri un Iphone 4 16gb Black, sin garantia que supuestamente estaba BLOQUEADO. cosa que asi no fue, el telefono esta liberado por imei, de todos modos no levanta señal. Aparece buscando y luego SIN SERVICIO. Lo desarme y veo que no hay continuidad en la antena entre los positivos. Alguien puede ayudarme? mi email es ALANCMG@GMAIL.COM

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Ace will be eternally grateful.

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