iPhone 7 no Power, no short!
I bought an iPhone 7 that came with no power, no charging issue, and without water damage. The phone was never opened and the board looks brand new. So I decided to look for the problem.
After going with troubleshooting , and after pressing the power button, the phone was drawing around 0.6 Amps, but no shorts were found in all VCC lines (MAIN, BOOST, etc). In fact all the PP lines were with the right voltage values.
Because there was some small heating coming from the CPU side (I couldn’t verify which side -bottom or top- was heating first), I decided to remove the stickers. After that, I could’t find any damage or short, so I removed the CPU shield (same as I did before). Then, I checked all voltages and looked for a short on VCC lines, but everything seamed normal.
However………. the current draw is now around 0.03 Amps after removing the shield.
I am afraid that I had a damaged/broken CPU chip (maybe caused from a faulty charger?, which I cannot know because the phone wasn’t mine).
Did the heating (from removing the shield) revealed the real problem? Or is it just something else? Does anyone has faced this problem before?
Thanks in advance for any hints!