How to Diagnose a Dead iPhone 14 Pro Max – No Power Investigation Tutorial

Описание: A completely dead iPhone 14 Pro Max came in with no power and no charging response. In this video I walk step-by-step through the full diagnostic workflow: measuring board consumption, locating a main rail short with thermal imaging, replacing the PMIC, and investigating cascading failures that eventually lead to a full board swap.

This is not a “magic fix” video — it’s a real-world repair case showing how diagnostics escalate when a board is heavily damaged. The goal is to demonstrate the reasoning process behind each decision, what to expect at every stage, and how to approach a no-power phone logically.

Topics covered:
• No power diagnostic workflow
• Main line short detection
• Thermal camera investigation
• PMIC replacement and reballing
• Secondary short analysis
• NAND reball
• Full board swap and recovery
• DFU troubleshooting
• Final validation and testing

Background music: Liquid Time – Aakash Gandhi (YouTube Audio Library)

0:00:00 Intro
0:00:40 Diagnose charging and board consumption
0:06:46 Thermal cam investigation
0:11:30 PMIC removal
0:38:41 Harvest, clean and reball a new PMIC
0:57:22 Investigate a new short
1:08:25 Replace U4000
1:20:29 Second attempt to boot board
1:22:22 Investigate PMIC issues
1:29:10 Replace PMIC #2
1:32:06 Third boot attempt
1:38:41 NAND Reball
1:40:56 Fourth boot attempt
1:46:06 Full Swap
1:56:30 Investigate and fix DFU issue
2:14:30 Final test