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 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!
We recently received an iphone 7 that would not turn on.
We plugged it in to charge and got no response from the phone. We then cleaned out the charging port which made no difference.
We then cracked it open and connected up to our DC power supply, it turned on and seemed to work perfectly other than charging. We tested with a new battery and charging port which made no difference. We then tested what voltage we get through the battery connector when charging and we got a very low reading of 0.45v.
In the iphone 7 the common causes for not charging are the tristar (charging ic) and tigris (USB ic). Unfortunately on the iphone 7 when one of these IC’s goes bad it usually damages the other, this means when replacing one we will replace both for peace of mind, otherwise you may find your device suffering from the same fault in the near future.
We believe that if your going to do a job you should do it right, this is why we do repairs our own tried and tested way and if we can find a way to improve a repair, we will do so.
So we disassembled this iphone 7 and tested the charging circuit. Of Course we found low voltages on the 1v8 and 3v lines coming out of the tristar. We replaced both IC’s and this brought the voltages up to where they should be. We then cleaned the board and reassembled for testing. The phone now pulls around 1A through the charger which is perfect and is charging nicely. We are also getting 3.72v through the battery connector which is a very good reading.
The phone was then returned to the customer who was very happy to get their device back and working within a day.
If your having issues with an iphone not turning on or charging please feel free to get in touch.
This week we received a macbook pro 15” 2010 from a regular customer of ours.
It was sent in for a backlight repair after water damage.
Our customer has already cleaned the board but this has not resolved the issue.
When we received the device firstly we make sure that it boots and shows a display on an external monitor, which it does. Then we do the torch test to make sure that the fault is no backlight and not no display. We can see the apple logo so we know that the image is being displayed and we are up against a backlight problem.
Next we open the macbook to inspect the board around the LVDS FPC (screen connector), we can clearly see 2 pins that are burnt out (pins 20 & 21) which are responsible for sending voltage for the backlight to the screen. We could see that the connector was burnt out, which would need replacing. We then removed the lvds cable (cable from motherboard to screen) from the connector to check this and this seemed fine from visual inspection. Next we powered on the macbook to check the voltages getting to the lvds connector. The backlight voltages where not present so we disconnected the battery and tested the fuse which was blown. After replacing voltage was restored so we knew that we should just have to replace the connector to have the clients macbook back up and running.
We applied leaded solder to the 30 pin LVDS FPC to lower the melting point of the alloy. Next we used our hot air station to heat the connector and remove it. We then cleaned the pads and surrounding area, and lined up the new FPC. After this we applied new solder to all of the joints, cleaned again and checked the connections.
All looked good so we reassembled the macbook and powered it up. The screen lit straight up proving that the repair had worked as expected.
We repair macbook boards on a daily basis, often after apple have quoted hundreds to replace the board itself rather than repairing it. Backlight problems are very common, along with no image, graphics faults and power issues. If your experiencing any issues with your macbook please feel free to get in touch
We have spent some time over the last week working on an ipad 5 that someone attempted to replace the screen on themselves.
Unfortunately this repair was with us about a week to get it back to its full glory.
It was brought in as after replacing the screen it would not power on. We connected to our ammeter and got 0.08/0.09 amps which is incredibly low for charging an ipad
We opened the ipad very easily as the replacement adhesive was very weak, straight away we could see that the home button flex had been torn. We removed the screws and gave the board a quick visual inspection. From initial inspection we could see that the power and volume button connector had been damaged. Also the connector for the home button was cracked and the main shield had marks making us think it had been removed before. None of this damage would cause the ipad not to turn on. We removed the main board EMI shield to inspect the components and saw no obvious damage.
We removed the board from the ipad and connected to our DC power supply to see if the ipad would boot. When connected and bridging power button the ipad would turn on and function, when then plugged into our ammeter we would only pull 0.08-0.22, constantly jumping which is still very abnormal. So from this we knew that there must be a fault on the charging circuit.
We then tested the voltages around the tristar charging ic and they seemed ok without checking to schematics. We then inspected the surrounding area and found a slightly damaged resistor, near where the pry marks on the shield was. we replaced this and the ipad would now charge normally.
From here we where able to test the device to ensure there were no more unknown faults before proceeding to repair the known issues.
Next we found a replacement power button fpc which matched the ipad air 1 connector, this was fitted which restored the volume button functions but not the power button. We checked the flex and found that one line from the power button was broken and repaired the flex.
We then turned to the home button, luckily the damage was on the connector side which is an extension flex, meaning instead of repairing the flex one track at a time we can actually replace the cable which is much easier to do and only needs basic soldering instead of lots of tiny micro jumpers.
We then tested this in the cracked connector on the board and although the connector was damaged it was still working fine, we decided that this did not need replacing.
As the ipad 5 is still a fairly new device we have not seen as many of these so do not hold as many spares in stock, this is the main reason for delays in this repair, along with the fact that schematics are available but no board views so components are much harder to identify than older models.
Nevertheless we returned the ipad to a very happy customer that was over the moon to have their precious ipad back in full working order.
There is a very common fault in the iPhone 7 family called audio disease or audio ic failure. This issue usually starts with a phone taking a very long time to boot (sometimes 5 minutes) and intermittent problems with hearing people and people hearing you on the phone.
As the fault develops further the speaker phone option will be greyed out, voice memos won’t work and sometimes the phone will get stuck on the apple logo.
These are all very common symptoms and are a design flaw on this model. The fault develops due to flexion of the mother board near the sim reader, which just like touch disease on the iPhone 6 Plus is caused by tracks being damaged. The fault often develops after the phone is dropped of bent and can often arise after your screen breaks.
All these issues can all be resolved by removing the audio ic, repairing the broken tracks and rebuilding the missing padsZ there is usually one main line that breaks which is the c12 pad.
When we repair audio issues on the iPhone 7 we will run jumper cables to 4 different pads making sure that the issue will not return again in the future and strengthening the connection.
The jumper cables that are installed are much stronger than the original board traces making this a long term fix. On the rare occasion that the IC itself is faulty we can also replace this to guarantee a true fix.
At micro soldering repairs we take pride in our work and carry out this repair daily. Are you experiencing any of these problems? Or do you run a repair shop and looking for a company to outsource your microsoldering repairs to? Why not get in touch today for more information on our services and our B2B rates?
Recently we had an iPad Air 1 in with backlight problems after a regular customer had replaced someones digitizer. This is a very common fault if the LCD is disconnected whilst the screen is on, and is usually caused by a blown filter.
We see this fault, amongst other backlight issues on idevices on a daily basis, we always start by checking with a known good screen. We then visually inspect the connectors and backlight circuits. Next we check filters and fuses which are usually found visually before testing. This is followed by checking for shorts and then we check our voltages.
70% of the time we will be able to physically see what the issue is with backlight faults, which usually makes fault finding very easy. This particular job just needed a quick visual check to see that one of the backlight filters had blown.
We removed the filter to find that one pad had also burnt off. This was not a major problem as we were able to run a micro jumper from the end of the remainnig trace onto the new filter to restore the connection.
This brought the ipad back to life restoring the full backlight.
We cleaned it up and sent it back on its way for another speedy repair and a happy customer that will come back again.
We take pride in our work and ensure that every job brings a happy customer at the end of it. If you have an issue with your device, or if you run a repair business and need a reliable company to outsource your board repairs to please feel free to get in touch.