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iPhone 7 Plus no power water damage repair

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!

 

iphone 7 water damage repair

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.

 

iPhone 7 audio ic repair, with a twist!

Recently we had an iPhone 7 in from a regular that had the classic audio IC symptoms of C12 pad damage. The phone would take a few minutes to boot, hung on the apple logo with home button vibrations, once booted it was very slow and we could not record voice memos. We also couldn’t hear on the phone and loud speaker was greyed out.

So we went about repairing the C12 pad damage as usual on any iphone 7 audio IC repair. When we lifted the IC up off the board there was no damage to any of the usual traces, all pads where firmly in place. We ran jumpers as normal anyway, reballed the IC and refitted it to the board. Unfortunately there was no change! We then removed the ic and replaced it incase the chip itself was faulty. This made no change either! We then checked the components around the audio IC and found the the resistor R1103 off of the C12 pad was faulty and needed to be replaced. We have done hundreds of audio ic repairs, and this was the first time we have seen it caused by this faulty resistor.

We tested the phone which was all working again, we then cleaned the board and reassembled the device. It was returned to our customer who was happy to have it back.

We have never seen this resistor cause audio IC problems before, but now that we have we will always check this before removing the IC, we don’t know if the IC was faulty too or if it was just this resistor all along but we know for sure that next time we see this faulty resistor we will find out.

The reason we love board level repair is because you can always learn something new, like when a classic repair turns into something a bit different for a change it makes your mind work a little bit harder.

 

iPhone SE restarting and battery jumps

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!

 

iPhone 6 tristar 1v8 line repair

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.

 

iPhone 6S Error 9 repair

A couple of weeks ago we received an iphone 6s in for no power. The phone was clean and did not appear to have been opened before. We plugged it into our charger through the ammeter and the phone pulled the expected current.

We plugged it into the PC and it connected to itunes in DFU mode. We spoke to the client who did not have any important data on the device so we were instructed to attempt a restore. The restore through up error 9 which is known to be a problem with the nand (the memory chip) which put simply is like the hard drive of the phone.

We disassembled the device and tested the power lines to the nand which where all present. Next we checked power to the CPU which was fine as well. Next we decided that it must be a bad connection under the nand or a faulty chip so we went to remove the nand so that it could be reballed. We put the board onto our bottom heater and applied light heat to the top ot the nand so that we could scrape away the black underfill around it, after this we cranked up the heat and went to remove the nand. We applied flux and slid a thin tool underneath to pop it off.

We then cleaned the pads and remaining underfill from the nand areaand did the same on the nand itself. Next we put the nand into our nand programmer to test it, the programmer could read all of the chip data so we knew that the nand itself was ok. We reballed the chip and cleaned it and the logic board. Next we applied flux and refitted the nand into position.

After installation we cleaned the board up and fitted it back into the housing. We connected up to the PC, still in DFU mode and clicked restore. We waited, waited and waited some more until the restore went through without error and the phone came back up as normal!

We tested the phone as far as possible without icloud details and where happy that the repair was successful.

We reassembled the device and sent it back to the owner who was chuffed to have their phone back in full working order.

 

iPhone 7 plus no power repair of trinity IC

We received an iphone 7 plus recently for no power. Our customer told us that when they connected a new battery the motherboard would smoke.

When we received the device we plugged it into our power supply and just as the client said we saw smoke coming from M2800 the trinity IC, often called the touch ic but it is actually just a cluster of coils for several different lines built into one IC. we also saw a 5 amp short on the main power line.

 

First off we removed the trinity IC, which is an ic that contains several coils, to find out which line was shorted. We found the short on the speaker amp line, so then we knew where to look! We flipped the board over to look around the speaker amp circuits and found a burnt out capacitor in the C3404 position.

 

We removed this capacitor and the short was resolved. Next we replaced the trinity IC with a new one and plugged the phone into our power supply. The short was gone so we prompted the phone to boot, the phone appeared to turn on and function normally so we unplugged it and fitted a new capacitor. We then cleaned the logic board and reassembled the device and charged it up for full testing. The device seemed to function perfectly so we returned to the customer who was very happy to have their device back fully working.

 

We have seen similar issues with shorts causing the trinity IC to fail but this was a first on this particular line, this is why we love board level repairs, each one is slightly different and you have to think on your toes!

iPhone 6S no power water damage repair

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.

 

iPhone 6 Plus Touch Disease

The most common issue seen on the iPhone 6 Plus and sometimes the iPhone 6 is touch disease. This fault is caused by flexion of the logic board which breaks connections under the touch IC.

The most common symptoms of this fault are:

  • Unresponsive touch screen.
  • Grey bars at the top of the screen.
  • Touch screen freezing.
  • Having to bend the phone for the touch screen to work.

This fault is caused by poor design by apple and flexion of the motherboard over time, it can also be caused by bad drops and bending of the phones rear housing. On the iPhone 6 Plus the housing of the phone is weak and can bend very easily, every movement in the housing passes through to the motherboard and over time traces within the motherboard break. In this instance the trace leading to the M1 pad under the touch ic in the phone breaks and causes touch disease, when the phone is bent in a certain way the connection is restored and this is why the issue can be intermittent.

At microsoldering repairs we are able to remove the touch ic, run a jumper to repair the broken trace and restore the connection to the M1 pad, then reball the ic and re attach it resolving the issue and restoring touch functionality.

This repair is future proof as the jumper put in place is stronger and less vulnerable than the original trace, meaning further flexion of the motherboard will not cause the connection to break again.

We repair a lot of this fault, along with other common issues such as audio ic on the iPhone 7, Tristar replacements for charging issues and baseband repairs for no service or searching faults.

 

Macbook Air backlight water damage repair

We received a macbook air in from a new customer who had attempted a diy repair after spilling a glass of wine on it.
The customer knew about electronics so decided to attempt to repair it themselves. They had let the wine dry out and cleaned the motherboard with pcb cleaner. After cleaning the macbook would still not power up. they had checked the battery and that was fine, so from there they where a bit stumped.
They brought it in for us to have a look at and i was able to disconnect the battery and plug the charger in to force the macbook to boot, we heard a chime but had nothing on the screen. Next we connected an external display and could see that the macbook was powered on. We had no response from the keyboard or trackpad.
Next we took a look at the motherboard to see if we could visually find the cause for these issues. We noticed that the LVDS FPC (screen connector) had corroded and a few of the pads where no longer connected to the connector so this needed replacing. We disconnected the cable from the connector and tested for voltage which we got, so we replaced the 30 pin LVDS FPC.
We also checked the cable which looked corroded on pins 20 & 21. This meant that we had to remove the screen bezel, hinge and cover to be able to replace the cable. For us this is an easy job and requires patience and practice to be able to do this without causing further damage. Most repair shops will just replace the whole screen at a high cost instead of doing this.
We proceeded to disassemble the screen then found that the LVDS FPC on the bottom of the screen was also burnt on the same pins meaning that this would need to be replaced as well as the cable.
Next we checked to see why the keyboard and trackpad where not working. We found that the keyboard would need to be replaced and that the trackpad had corrosion on the connector which just needed cleaning to fix it.
We then quoted the client who was more than happy to go ahead as the costs where far cheaper than replacing the macbook. Within 24 hours of acceptance the macbook was back in one piece and fully working.
Another successful repair and another happy customer.

If you have had an accident with your macbook and apple have quoted to replace your motherboard please get in touch, we can save hundreds on repair costs by repairing your board rather than replacing it!