how to fix Dead iPhone | iPhone 7 Plus PP3V0_NAND Shorted
To fix an iPhone 7 Plus with a PP3V0_NAND short, follow these steps:
Diagnosis:
Confirm that the iPhone shows no signs of powering on or charging. Measure the PP3V0_NAND line (3V0) using a multimeter to check for a short to ground.
Disassembly:
Use specialized tools to carefully remove the screen and disconnect the battery.
Remove the logic board for inspection.
Locating the Short:
Use a multimeter in continuity mode to test components related to the PP3V0_NAND line, focusing on capacitors, inductors, and ICs near the NAND.
Inspect for any visible damage such as burnt components.
Fix the Short:
If a faulty capacitor or component is found, use hot air rework or a soldering iron to carefully remove and replace it.
Clean the area with isopropyl alcohol and check if the short has cleared.
Reassembly & Testing:
Reassemble the phone, reconnect the battery, and test by powering it on to confirm the issue is resolved.
If the short persists or components appear damaged beyond basic repair, consider professional board repair or replacement.