We had an iphone 7 plus in recently after our customer had cleaned the phone after water damage and the phone would still not turn on. The water damage was minor and had only affected the top of the board.
Upon inspection we had a 5 amp short on VDD main. We checked over the board and found that capacitors C2609-2611, where all very corroded and needed replacing. We removed these components and tested again, unfortunately the short was still present. We then removed the CPU shield to inspect this area. The shield had not been removed so cleaning of the board could not have been done properly, after removing the shield we found a lot of corrosion above the CPU covering capacitors and resistors. We cleaned the board and saw that there were still several components that were visibly corroded, most seemed minor and we did not think these were a problem. We probed around in diode mode and found one nasty looking capacitor C3325 on the speaker amp line that was short. We removed this capacitor which cleared the short on this line and on the VDD line too, these lines where linked through U3301
We plugged the phone into our power supply and it booted up normally, we tested the basic functions and all seemed fine. We then cleaned the board and reassembled the device and returned it back to our customer who was very happy to return the device to its owner fully working.
We love working on water damaged devices as the owners are always so happy to get their phone and more importantly their data back!
If you have a water damaged device with important photos on please feel free to get in touch. We love a challenge!
Last month we received an iphone 7 in the post from another shop after they had cleaned the motherboard for water damage. The board did not look very corroded, just a few spots but nothing major.
We plugged it into our power supply which showed us that there was a short on the VCC main power line. We removed the board and checked for heat which seemed to come from the bottom of the board on the back near tristar. We looked and could see one cap C3710 near the tristar IC that was discoloured, we removed this and the short cleared. Next we assembled the phone and tested that it would power up, it did.
We then tested basic functions and found that the home button and taptics where not working. There was a lot of corrosion around the home button FPC so tested it with a new screen, which brought back the button functionality but not the touch ID. i then checked the button properly under the microscope and found that the fpc was very corroded. 2 pins had separated from their pads and where not connecting to the flex. We resoldered these connection and tried again on the new screen which resolved the issue.
We still had no taptics so searched the board for a reason, we found corrosion around U3502 the arc driver that is connected to the taptic engine so we removed it, we cleaned the pads, reballed the IC and refitted it. The taptics kicked back in and we had another fully working phone. This repair did take a little longer than most due to there being various faults but we still had it back up and running within 48 hours, if it was just a data recovery job then we could have turned it around a lot faster but as the client wanted their phone back working so we did the extra work to suit their needs.
Just another service offered by the team at microsoldering repairs.
This week we received an iphone SE that had battery issues after a screen replacement. The battery percentage would jump up and down and the phone would randomly turn off. This was a common issue on the 5s series, usually caused by components by the battery connector being knocked off or damaged during repair.
This iphone SE was exactly the same, when the repairer had disconnected the battery they had knocked FL2400 off of the board, causing the battery issues. This filter is in a very tight space and is very hard to get to. The way we go about this is by applying solder to the pads using our micro tweezers, then putting the new filter in position and using heat with a very low airflow to reattach the filter back into its position. After the repair we tested the phone to make sure the battery would behave normally, staying at a steady percentage, charging normally and not turning itself off. The issue was resolved and we had yet another happy customer!
We recently received an iphone 6 that was not charging. A new charging port and battery had already been fitted by another shop and not solved the issue.
We connected new ones and still the phone would not charge. We disassembled the phone and removed the shield over tristar expecting it to be a standard tristar failure. Everything seemed normal, to start with, no previous repair attempts, testing the lines showed 3v3 line power as normal but nothing on the 1v8 line. There were no shorts around the IC so we went ahead and removed the tristar charging ic.
Once removed we could clearly see why there was no power on the 1v8 line. The trace to pad F3 had totally burnt out and no longer existed. This was not a problem for us. We simply made a micro jumper from C1739 to the F3 pad to remake the connection. We then fitted a new tristar charging ic and tested the device, we now had power on the 1v8 line and had restored charging capabilities to the phone. We tested voltage coming into the battery connector and had 3.7V which is perfect.
We reassembled the device and sent it on its way back to its owner who was very happy with the repair. We had restored full functionality to the phone that they had been told could not be fixed elsewhere.
If you have a charging issue on your iphone or have been told somewhere else that your device is not fixable, please feel free to get in touch, we would be happy to help.
We had an iphone 6s in from a new customer that was reported for not turning on.
We plugged it in to charge through our usb ammeter but had no response at all from our charger.
When we first opened the device we could clearly see that it had had the shields removed and had been cleaned for water damage already. We next checked it plugged into the dc power supply. The phone turned on fine and seemed to have basic functionality.
We removed the board from the phone and found that the device had already been worked on previously, the tigris usb IC and the small audio IC had both been removed, we assume that these were damaged and possibly causing a short originally and that’s why they had been removed. We cleaned the areas and fitted new IC’s to test the phone. We tested for shorts and found none so we plugged a battery and charging port in to see if the phone would now charge. When plugged into the ammeter it appeared to charge up fine so we decided to reassemble the device.
Once reassembled we tested the phone, the battery charged fine, all audio was there, on headphones and both speakers. We where unable to find any further faults so we packaged it up and sent it back to our customer.