Newer Samsung Galaxy phones have a "temp sensor", which is really a thermistor, on the back wireless coil/NFC.
If you don't have this plugged in, the phone will not charge & give a ⚠ temp warning symbol.
In this case, I had no extra wireless coil to test with.
Looking through the part, I spotted the component. And if you look closely, you can kind of see where the traces from it run to.
So using continuity mode, I checked for continuity from the FPC to the thermistor. I found 1 pin (red in the pic), but the other side would not get any continuity from any pin.
Since the traces are mostly visible, I scratched off the top layer to expose the copper trace & started probing around.
Take a look at the 5th pic. I first did blue to blue, then red to red, then orange to orange. When I got to green to green, I noticed I would sometimes get continuity when pressing down & the cable moving around.
This told me there must be a broken line somewhere between the 2 dots.
I ran a jumper from where the broken line was detected, green dot to green dot. From there, I was able to get continuity from the thermistor to the FPC from both sides of the component.
Plug it back into the phone & the phone started charging properly!
Sure, I could have just bought a new wireless coil & that would have solved it, but where's the fun in that? lol
Make sure to like this post if you found this helpful!
If you have a Seek Thermal Cam, you're missing out if you don't have a VCC Seek Stand: https://www.vccboardrepairs.com/buy-seek-stand
Injured Gadgets just got these back in stock, so get them while you can!
It can take us a while to build these out sometimes, so they're sometimes out of stock for a while, but we're working towards always having inventory ready to build more as they sell out.
This stand makes using a thermal cam so easy. So much better than any other thermal solution on the market.
It allows you to get real close up (using my Macro Lens), and easily find where the short is coming from.
Plus it's hard free, so you can have your hands free to try to boot the device from DCPS, while having an image that is in focus & not moving around.
You can even record a video through the app, while you inject voltage into the short, so you can go back & see exactly which component was it that was heating up.
Save yourself lots of time by getting a Seek Cam, Stand & Macro Lens! ...
Anyone who is doing game console repairs, knows how many screws you need to remove to access the motherboard.
Especially the PS5, with the 5,000 screws or so.
If you don't already have an electric screwdriver, GET ONE ASAP.
🌟 Cordless Screwdriver with T9 Bit: https://amzn.to/3E5duCj
🌟Extended T9 Bit: https://amzn.to/3c4YJac
It's rechargeable through micro USB and allows you to easily swap the tips out. You can also fold it to be straight or L shape.
Let me know below if you are already using an electric screwdriver 👇👇
Device came in water damaged after a previous repair attempt by another technician.
Board had scraped areas near the battery connector, unnecessary UV mask around multiple components, and incomplete inspection (main CPU shield was never removed).
Initial checks:
VPH power and VBAT lines not shorted
1V8 rail was hard shorted
Troubleshooting process:
Removed shields that were never taken off during the previous attempt
Removed charging IC due to questionable solder work
Removed a nearby IC that was still corroded underneath
Used DCPS + thermal camera to inject voltage and attempt to locate the short
Continued inspection and testing until no further progress could be made
At that point, proceeded with a full CPU swap:
CPU, RAM, UFS, and EEPROM transplanted to a known good board
Device booted and data was successfully recovered.
Full breakdown is up on YouTube. Link in the comments below
I got this S23 Ultra in for data recovery and some other tech already worked on it.
But this is what I found
They scraped a whole section of the board
Doesn't make any sense why
Plus, a ton of UV mask on the components next to the FPC lol
WHYYY??
I recorded the data job on this one, so i'll be posting it soon! Let me know if you want to see it in the comments below!
Working on a new full length YouTube video right now, and it’s a good one.
iPhone 14 Pro Max – Water Damaged Data Recovery
This board was a tricky one with corroded caps & ICs and had a bunch of issues going on.
Not your typical “replace a part and it works” type of job.
I go through the full process step-by-step:
-
diagnosing the faults
-
finding the shorts
-
clearing the corrosion
-
and getting it stable enough to recover the data
Still editing it, but it should be posted soon ✅
If you’re into board level repair or want to learn how to troubleshoot stuff like this, keep an eye out.
Video link will be in the comments when it’s live.
