WiFi greyed out iPhone 4S – iphone , badly help needed malfunctioning or other issue help please

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WiFi greyed out iPhone 4S – iphone , badly help needed malfunctioning or other issue help please

On January 27, 2015, Posted by , In iPhone, With Comments Off on WiFi greyed out iPhone 4S – iphone , badly help needed malfunctioning or other issue help please

Hello,


Ive got an iPhone 4S from a customer, who said he had a greyed out WiFi and had an attempt to fix it, wich resulted in the iPhone not booting at all, even when on wall socket.

After looking at the schematics I gound out it was the wifi chip wich had a short.

After I replaced the wifi chip the iPhone would boot normally.

But I noticed that R49_RF and C13_RF had come off, and when the iPhone was put on the charger, the U5 chip would become veeeeery hot and the battery meassured 4,05volts.

After letting the iPhone rest for a day it would boot normally Along without getting very hot, but it now has greyed out wifi.

So my question is : are the missing R49_RF and C13_RF the cause of the greyed out wifi? And can I fix them?

Kind Regards

No Comment so far:

  1. Wela says:

    Make sure you replace the capacitors which were lost Along with
    the same value capacitors

    Also if your wifi is greyed out reheat the wifi chip
    at 300 degree celciues on heat flow 3 for about a minute.
    and it should come back 99%

    but make sure you replace the caps.

  2. TechGuru says:

    Replace everything thats missing Along with the same values.

  3. TechGuru says:
    Quote:
    MrInformation >
    Make sure you replace the capacitors which were lost Along with
    the same value capacitors

    Also if your wifi is greyed out reheat the wifi chip
    at 300 degree celciues on heat flow 3 for about a minute.
    and it should come back 99%

    but make sure you replace the caps.

    I think my problem is that Im missing the 2 resistors above the WiFi chip.

    A reheat did not work and I cant seem to solder them on, they just wont stick

  4. TechWorld says:

    reflow chip module wifi 200 deegree celcius tested by me

  5. TechWorld says:
    Quote:
    Mrpokokejoget >
    reflow chip module wifi 200 deegree celcius tested by me

    I know the reflow works 99% of all the time, because I do it in all of my greyed out repairs, but Along with this one it didnt to be helped, and I think because of the missing resistors the WiFi isnt working.
    I tried too solder other ones on but they just dont stick title=frown