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Deze versie is geschreven door: oldturkey03 (stem details) ,

Titel:

How to test if logic board is broken

Tekst:

I've got this iPhone 4S which shows a lot of issues:

* Wifi is grayed out
* Bluetooth is not working
* No cellular signal (but here I saw the antenna connector to the logic board is missing, so this can be replaced)
* Vibrator is not working
* Mic is not working
* Speaker (bottom) is not working
* Camera LED is not working
* Battery is not working (iOS always reports a full charge, even if no battery is installed)
* Proximity sensor does not seem to respond
* Audio jack (also no signal from Apple earpods remote)
* GPS data (and compass) not working

These things are working:

* Front camera
* Back camera (but not the LED)
* LCD works perfectly
* Touch works
* All buttons work (volume, mute, lock, home)
* Home button
* Dock connector (to power up)

Not tested (or not able to test):

* Charging
* Earpiece

I've also noticed that this iPhone is jailbroken (there is a Cydia app).

I've received this iPhone in exchange for my own 4S which has drowned. This repair center has moved and is unable to be contacted. So after a few months I gave up and decided to try to get this other 4S working. I was planning to buy a bunch of parts but I'm having a feelding something is wrong with the logic board. Is there any way to test it or to test any of the parts on them selves?

I have already tested the battery which does not seem to give any voltage between the outer connectors.

I don't want to buy all the broken parts if it turns out to be the logic board.

Apparaat:

iPhone 4S

Status:

open

Goedgekeurd antwoord:

138024

Origineel bericht door: Jeroen ,

Titel:

How to test if logic board is broken

Tekst:

I've got this iPhone 4S which shows a lot of issues:

* Wifi is grayed out
* Bluetooth is not working
* No cellular signal (but here I saw the antenna connector to the logic board is missing, so this can be replaced)
* Vibrator is not working
* Mic is not working
* Speaker (bottom) is not working
* Camera LED is not working
* Battery is not working (iOS always reports a full charge, even if no battery is installed)
* Proximity sensor does not seem to respond
* Audio jack (also no signal from Apple earpods remote)
* GPS data (and compass) not working

These things are working:

* Front camera
* Back camera (but not the LED)
* LCD works perfectly
* Touch works
* All buttons work (volume, mute, lock, home)
* Home button
* Dock connector (to power up)

Not tested (or not able to test):

* Charging
* Earpiece

I've also noticed that this iPhone is jailbroken (there is a Cydia app).

I've received this iPhone in exchange for my own 4S which has drowned. This repair center has moved and is unable to be contacted. So after a few months I gave up and decided to try to get this other 4S working. I was planning to buy a bunch of parts but I'm having a feelding something is wrong with the logic board. Is there any way to test it or to test any of the parts on them selves?

I have already tested the battery which does not seem to give any voltage between the outer connectors.

I don't want to buy all the broken parts if it turns out to be the logic board.

Apparaat:

iPhone 4S

Status:

open