Iphone 5s no power on – problem in cellphone

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Iphone 5s no power on – problem in cellphone

On March 29, 2015, Posted by , In iPhone, With Comments Off on Iphone 5s no power on – problem in cellphone

Hello,


I have an iPhone 5s Along with the battery connector broken off. +- pads remained intact but the middle pad broke in both places. All components near the battery connector are missing (C9, C22, C275, C25, C23, C279, FL11).
I think that the phone could work Along without the capacitors but a jumper is wanted to the FL11 pad. I did that but the phone does not turn on. The battery pads are not in short, nothing happens if I connect to computer or charger.
Was the phone supposed to start if its connected to the charger even if the battery is missing?
Is the jumper correct?

I currently put wires from motherboard to the battery as I dont have a replacement connector yet, but it should work Along without it.

If anybody has any ideas what may cause this behavior and what parts to check, kindly tell me.

Thank you, any suggestions are welcomed.

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No Comment so far:

  1. tavenger5 says:

    The battery has 3.77v. If I connect the charger, the voltage drops to 3,4v and then goes back up to 3.77, after 3 seconds it happens again in a loop.
    The processor grill is warm and iTunes does not recognize the phone.

  2. RandikPixie says:

    first of all, i would recommend to repair the connector. Then replace all missing Capacitors and Filters. maybe the solution is that?

  3. Metaton says:

    I saw posts on this forum that those components are not wanted. I manually charged the battery to 4.1 volts and the phone still does not start.
    If I connect the charger the board will heat up (U7 ic).

  4. qwerty305 says:

    Does anybody knows what Test Points to measure in order to identify the problem? Or any other tests I could do to find the problem.

  5. Ann Elmore says:
    Quote:
    adri >
    I saw posts on this forum that those components are not wanted. I manually charged the battery to 4.1 volts and the phone still does not start.
    If I connect the charger the board will heat up (U7 ic).

    You have screen backlight problem.

  6. Bo-Rens says:

    Thanks for reply. How do I fix that? Shouldnt the phone be recognized by iTunes then?

  7. TechWorld says:

    I examined the board and U11_RF seems a little burned on a side. Could this IC cause this problem?

  8. arminasg says:

    I measured capacitors and the following ones have continuity(resistance ~0.1ohm):
    C58_RF
    C56_RF
    C123
    C189
    C175

    Is it safe to remove them?