We had a customer in this week with an iphone 6s that had gotten very hot and stopped working.
We connected to our ammeter and found that it was not charging at all. After this we opened it up and connected to our dc power supply, there was no amp draw even when we pressed the power button which is very unusual.
We then checked the power button which was working fine. There was also no short on the main power rail which can be a common cause for no power on the 6s. Next we removed the logic board and inspected the bottom of the back where we see most power issues on the 6s and we found that Q2300 had blown and C2330 next to it was burnt out.
We removed these components and replaced with a new power IC and a capacitor from a donor board which resolved the problem. We connected it back up to our power supply and the phone booted like normal, we then reassembled the device and checked that it would charge and work without getting hot and dying again. After testing we were happy with the outcome of the repair, The phone now charges and powers up and works perfectly.
The customer was delighted to get their phone back in working order.
If you have a phone that won’t turn on or charge please feel free to get in touch, we can repair 90% of power issues and are always happy to help.
There is a very common issue across many apple devices, from iphone 5s up to the 8 and ipad mini through to the ipad 6 2018 which is the dreaded not charging, fake charging or rapid battery drain issues.
These are all commonly caused by a faulty/damaged Tristar charging IC and in some models the Tigris USB IC. This IC in simple, regulates the voltage that is put into charging your battery. When this malfunctions it can cause many different issues, such as not charging at all, not charging a flat battery, not powering on at all, rapid battery drain and only charging when turned on/off to name a few.
This damage is most commonly caused by cheap cables being used and charging your phone in the car. Apples own cables can break pretty easily so people often go and find the cheapest possible replacement, which is never a good idea, cheap cables do not have a regulated output meaning the voltage into these IC’s is too high and damages them.
When this IC fails, most repairers will tell you that this cannot be repaired or that it will take several days to a week.. This is because they lack the knowledge and are unable to test these components and replace them themselves. We specialise in board level repairs and know the tristar circuit like the back of our hands. If you’re having problems charging your phone or getting it to turn on please feel free to get in touch. We are confident we can get your device back up and running no matter what the issue is.