6s+ short on GPU and CPU Help

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6s+ short on GPU and CPU Help

On October 21, 2017, Posted by , In iPhone, With 9 Comments


Have a water damaged iPhone 6s+ that has a short on both pp_gpu and pp_cpu lines.

Ive applied power directly to those lines individually and in both instances the same area gets warm which seems like the CPU itself.

How could I in fact determine if its the CPU and not the PMU chip?

9 Comments so far:

  1. RandikPixie says:

    I have the same problem. Do you find the issue?

  2. sulmanz says:
    Quote:
    rn cosm >
    I have the same problem. Do you find the issue?

    nYes it’s a fault short. Both those lines have very low ohm readings. Use diode mode to verify they are not 0 ohms, a low reading is normal. 0 reading isn’t.

    nI compared to a known good board to understand it.

  3. arminasg says:

    PP_CPU show 44 ohms and PP_GPU show 10.2ohms. Both get a beep in diode mode.
    nIs It normal?

  4. Bo-Rens says:
    Quote:
    rn cosm >
    PP_CPU show 44 ohms and PP_GPU show 10.2ohms. Both get a beep in diode mode.
    nIs It normal?

    nSeems pretty normal. On my good board I measure 10ohms on pp_gpu and 22ohms on pp_cpu

  5. baybee says:

    I like this conversation

  6. Phil says:

    nice share sir..now i have a idea..thanks….

  7. newComer says:

    Keep in mind that if you are working Along with complex chips (like CPU/GPU chips) you will get a low reading, the bigger the chip, the lower the reading will be.

    nThat’s the take away here

  8. Phil says:

    Any news about this problem ?

  9. Wela says:

    the only way to know if you have a short is to compare Along with a good board Along with diode mode

    nHandy Reparatur Bensheim