Released September 25, 2015. Model A1687/A1634. Repair of this device is similar to previous generations, requiring screwdrivers and prying tools. Available as GSM or CDMA / 16, 64, or 128 GB / Silver, Gold, Space Gray, or Rose Gold options.

329 Questions View all

Water damaged, won't turn, I had it charged

my phone dropped into water, it won't turn on. I opened the iphone 6s plus took off the shields, and plugged it in. connects to itunes in dfu mode. I then cleaned it throughly. afterwards, i put on new battery and lcd screen but it won't turn on. The Cpu seems to overheat alot. I checked the logic board with the naked eye and couldn't spot any problems. Is the problem with the fpc connector or the pm ic. the charging port works fine due to it begin recognized in itunes or 3utools. Also how can i use the multimeter to determine the problem or diagnotic the logic board in full and what should i use, continuity, resistance, dc, ac or anything else.

Answered! View the answer I have this problem too

Is this a good question?

Score 0

Comments:

has any of the indicator stickers turned red

by

Add a comment
Deck the Halls
With tools and Fix Kits

1 Answer

Chosen Solution

When dealing with a “dead” phone, you have to start at the beginning and check PP_BATT_VCC, PP_VCC_MAIN and PP5V0_USB. I would start by checking to see if those rails are shorted to ground. If one of these rails is shorted to ground, then you will need to identify what is causing the short. It could be a bad decoupling capacitor, conductive debris or defective IC that is directly supplied by those rails.

If they are not shorted, then you can connect, preferably, a known-good battery (or a current limited DC power supply with the appropriate connector adapter) to see what voltage you measure. If the voltage is low or lower than the battery voltage (which you measured before plugging it in ;>), then there could be a short circuit on secondary subsystem that is causing the battery or DCPS to be current-limited.

Then you move onto the PMIC and check the voltage rails it generates. Report back and I can give you more guidance.

Was this answer helpful?

Score 1
Add a comment

Add your answer

fahad ali will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 6

All Time: 39