User Profile

[Jessa_the_Professa]

Check or replace NAND area resistors—the device can’t communicate with nand....

[Jessa_the_Professa]

Moving CPU is the last tool not the first. What if you have one resistor by NAND that is loose? Why move CPU, NAND and EEPROM for that? What if you...

[Jessa_the_Professa]

To work on SE CPU, you must first separate RAM chip from CPU. Your first step is to work on iCloud locked iPhone 7 where RAM does NOT have to be separated,...

[Jessa_the_Professa]

Housing swaps are notoriously problematic. One reason is that things touch ground in the new housing that do not touch ground in the original due to...

[Jessa_the_Professa]

bare housing--now this REALLY sounds like parts. Put the board into a known good housing. You'd have to work pretty hard to convince me this was a board...

[Jessa_the_Professa]

For digitizer/touch, open notes app. Choose a marker and draw. You will see any dead lines or lag this way. Another idea if you do not have passcode...

[Jessa_the_Professa]

Great job--very logical. A great tools is thinking "How did it come to be this way"

[Jessa_the_Professa]

I notice in this post that you said "tried a new camera" but the complaint is that both cameras don't work. The front cam and rear cam are...

[Jessa_the_Professa]

We always have to start with rule #1---install the board into a housing that you recently confirmed does not have this problem. This is a parts problem...

[Jessa_the_Professa]

The charging chip seems to get damaged on these all the time and causes lots of weird problems, you can eliminate that as a variable and jump battery...

[Jessa_the_Professa]

What happens if you try to update? For some iPhone 7 there is a small resistor next to NAND which will cause the device to fail iTunes update with error...

[Jessa_the_Professa]

What does the top board do when put in iSocket, or combined in iSocket with a known good bottom board?

[Jessa_the_Professa]

"The problem is where the water was" You can always see where water was on the board from oxidized capacitors. Cleaning can remove the green...

[Jessa_the_Professa]

Okay--fair enough. It is a great place to learn on boards that people would "kinda sorta" like to have the data recovered, but they aren't...

[Jessa_the_Professa]

Think of R0303 as a tree trunk. It connects the roots (1v8) to many branches (i2c0)---CPU, backlight driver, chestnut, tristar, PMU

You...

[Jessa_the_Professa]

Short = inappropriate path to ground. A mosfet like q2300 does not have a way to fail to start touching ground. So we know Tojaert above is correct....

[Jessa_the_Professa]

If you have OL at these CPU lines then that makes it most likely that the reason this phone will not boot is CPU or RAM. DO NOT attempt to reball the...

[Jessa_the_Professa]

Those are all trolls—lines that have normal
low resistance to ground. Compare to a known good 6s and check resistance to ground to confirm....

[Jessa_the_Professa]

Always think-"how did it come to be this way?" like a physician. The chance that audio ic came loose in iPhone SE is very low---that is not...