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iPhone 13 Pro Max - Power Leak After Water Damage

iPhone 13 Pro Max - Power Leak After Water Damage (Device Previously Underwent Motherboard Repair)

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Hi everyone, I need help with my iPhone 13 Pro Max. I'm a regular user, not a professional technician, but I've disassembled the phone to check.

• Background: This phone has had a motherboard repair (motherboard replacement/mainboard replacement) before and was working fine.

• Problem: Recently, the phone was water damaged. A technician helped restart the phone, but now it's experiencing a serious power leak (battery drain).

• Current Status: The phone powers on, but the battery percentage drops rapidly even in standby mode.

• Request: Given the history of previous motherboard repairs and recent liquid exposure:

1. Can you provide a video or visual guide on how to locate the leak?

2. Which specific areas on the iPhone 13 Pro Max motherboard are most susceptible to short circuits after water damage, especially if they have been previously repaired?

3. I have attached a screenshot of the device's current state (image.png).

4. Can I repair it myself? Please help me. I need guidance on what to check next using basic tools. Thank you!

Answered! View the answer I have this problem too

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Posted: May 3, 2026

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Water damage + a previous motherboard repair is a strong sign this is a board-level power issue, not normal battery drain.

Since it powers on but loses charge quickly even in standby, that usually means a short or leaking component on the logic board drawing constant power.

Before anything else, check the panic logs and run them through an online panic log analysis tool. If there are repeated power or sensor-related panics, it can help confirm which subsystem is affected.

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iPhone 13 Pro Max

iPhone 13 Pro Max - Power Leak After Water Damage

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