Elliot

Hi, We have a water damaged iPhone 8 that had a VDD_Main short, this has been alleviated, with ZXW I can see a lot of...

Hi, I have a weird situation, an iPhone 7 came to me, it boots fine and charges. I replaced Tigris (because with freeze...

S6 that has been water damaged, ultrasonically cleaned and I can see no short. Main VBAT voltages seem ok, there are a...

We have a board that the U2710 gets really hot. I ordered replacement chips and swapped this power switch component. Same...

Good afternoon, I'm just researching a water damaged iPhone SE that initially had a VCC_Main shorted that was alleviated...

I have a 6S that is a bit weird. It goes to the Apple logo then recovery mode. it always enters recovery mode, even when...

Hi, Dropped A1586 here that had a short on PP3V0_NAND. faulty cap located and replaced. Device now boots up with no image...

Device is entering download mode but no USB recognition in any mode, doesn't exceed past battery with question mark. I...

Have two G935F phones that are both hard bricked. One draws 0.05mA when plugged in or whenever the USB cable is connected....

Hi all, We have a water damaged 6s that draws no power when the battery is connected, our USB Ammeter shows that with the...

Has the screen been replaced? This could be something like ''Long Screw Damage'' Try to put it in recovery mode and update it, it might give you an error code that gives you some clue. Also, what is the history? what’s happened for the device to be in the condition it is in?

I managed to sort this one. At first I swapped this U2710 and it made no difference, what did sort it was changing Tristar, I also changed Tigris before Tristar but that didn’t change anything, so it was a Tristar fault I believe. Successful case!

The SIM golden contacts look good? if not give them a swab with IPA and a Q-Tip, I’ve known this to cause SIM related problems, but if it is working completely fine in another phone then this might not solve it.

Got to the bottom of these and thought I’d share the knowledge. One phone had a short on "C3 image processor / Samsung S2MPB02 PMIC" (VDD_COMP_CORE_0P8) I didn’t think the caps looked bad so I removed the IC itself and the short went away, the device booted again with full image only camera not working, data is all fine though which was the main concern. The other phone however was not solvable. a full short to ground was found on VDD_0P8_CP by comparing board values. Two caps and one filter removed for this small line and short still present. Lower bigger PMIC removed and short still present. The only place left is the CPU, I had to call this one a day because replacing the CPU is out of my depths (even then it may be unique with the hardware encryption.

Although I doubted if the U2 was even the issue because power was getting inside the phone, replacing the Tristar IC did the trick. I usually like to refer to STS Telecom for this fault, they have a good video that I refer to if I need it: https://www.youtube.com/watch?v=XLFkvPA_... Problem fixed!