Apple iphone Error Code No Power

What does No Power mean?

iPhone shows no signs of life - no charging indicator, no Apple logo, no vibration.

Common causes

• Fully discharged battery (trickle charge needed)
• Failed PMIC (power management IC)
• Battery connector disconnected or damaged
• Charging port failure
• Logic board damage

Diagnostic & testing steps

1. 1. Connect to power supply and set to 5V/0.3A - check for draw
2. 2. Good battery: pulls 0.5-1A during charge
3. 3. Dead/swollen battery: pulls 0mA or <0.1A
4. 4. Short circuit: pulls maximum current immediately and gets hot
5. 5. Inspect battery connector pins for corrosion or damage
6. 6. Test USB port with known-good cable and charger
7. 7. If DCPS shows abnormal draw, board-level diagnosis needed

Tools required

• DCPS (DC Power Supply)
• Multimeter
• Pentalobe/Tri-wing screwdrivers
• Spudger

OEM parts & part numbers

Battery, Charging Port Flex Cable

Part numbers: 661-20199, 923-03798

Safety warning

⚠️ Li-ion batteries can ignite if punctured. Never pry at battery. Use battery adhesive remover strips.