Fix Your Stuff Community Store

Repair information and guides for the iPhone 6S Plus that was released on September 25, 2015. Model A1687, A1634

1041 Questions View all

Options

iPhone crashes if the screen is on for >2 minutes at a time

This iPhone is water damaged. I soaked it in alcohol and got it working, but now it crashes if it's on for more than a few minutes. It also won't charge over 3%; I suspect it needs a new U2 chip. The home button is bad but it might be the cable in the back light, it's happened to me before. Anyone have any idea what's making it crash? It only crashes while in use, not when sleeping. Can't remember if it was crashing when I went to restore it with iTunes initially; maybe it's just an iOS issue? 11.3.1

It has:

  • New battery
  • New charging port
  • New vibrator
Answered! View the answer I have this problem too

Is this a good question?

Yes No
Score 0
Add a comment

1 Answer

Filter by:
Most Helpful Newest Oldest
Chosen Solution

Options

The water is inside the phone, on the logic board and under the shields, even under the IC's. Soaking a logic board in alcohol is usually not sufficient for recovering a water damaged phone. At the very least, it should be lightly scrubbed with a soft brush and then soaked. Ideally, the shields should be removed and it should go in an ultrasonic bath. Not every water-damaged phone is recoverable and depending on the kind of liquid (salty, dirty, filthy), sometimes the success rate is quite low.

As to what is wrong with your phone, it's hard to say. Obviously there is something wrong with your charging circuit but it could be a lot of things. You need to start probing the circuit to understand what is working and what isn't, there's no "silver bullet" solution to water damage.

Was this answer helpful?

Yes No
Score 3

4 Comments:

I did soak, scrub, and remove the shields, but I see what you mean.

by

Alright...cool, good job!

Start probing the charge circuit (Tristar, Tigris, PMIC & MOSFET to see if anything is not as it should.

by

I'm very ill-equipped, I'm a novice. What would I need to do that? I assume the Tristar is bad, that's the U2 right?

by

Don't assume anything...probe the circuit first to see if anything is wrong. Otherwise you're just changing parts and smothering the board with heat. That can cause all kinds of collateral damage.

by

Add a comment

Add your answer

M J will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 0

All Time: 74