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I have an iPhone 7 which came to me looking like it was thrown against a brick wall but the board looked good. Power is coming in fine, but amperage is constantly rising to 480 milliamps and dropping, over and over. With freeze spray, I found that it’s heating REALLY rapidly under the CPU where pins c65/c66/d66 are (pp1v8_sdram and pp1v1_sdram). Can someone throw me a bone? I’ve checked for shorts at every point that these pins are related to. Can someone help me get on track?
You need to determine if it is a power issue or a data issue. A close visual exam is also extremely important. You said it looked like it had been thrown against a wall. · The .48A is coming from your DCPS and not an amp meter? · Check all NAND power rails are producing the correct voltage. · Check all coils around CPU for cracks as this happens on the 7 series. · Try putting it in DFU mode. · Put some pressure on the CPU and prompt to boot. These can turn into time consuming repairs but as I said you first need to determine if it is a data problem or power problem.
Have you attempted a battery replacement? Also, is the battery 3rd party or does it have low health?
