Chris Stables

Making up some leads for the DCPS and would like to know does the MacBook determine what wattage magsafe it is using from...

I don’t know a lot about MacBook circuitry and I don’t advertise their repairs but there is one customer who does send...

Any idea where I could purchase a QFN8 to DIP8 Adapter that will fit a bios chip off the 820 00875 board. The only one I...

I got sent a mac which had the U5860 temp sensor torn off along with all the pads on the board. It would take ages to boot...

Would someone be able to tell me the orientation position of U5860 on the 820-00239 logic board. I can only make out a...

You would need to rule out your screen. The main reason for a non-functional home button on the 7 and 8 series is a faulty home button flex cable, the one that goes from the screen to the logic board.

This is a common problem for the 6s plus. The Wi-Fi chip develops a short. I would make sure you have backed your data up. The replacement of the iPhone 6s Wi-Fi chip would cost more than another good second hand one.

I had this problem once on a water damaged iPhone 6 after running the jumpers and re-balling the baseband CPU it still had no firmware. I replaced every chip under the bottom shield and it didn’t help. So I would defiantly say this is the baseband CPU or the traces under it. I wouldn’t spend any more time on this.

This is a signature fault on the iPhone 6 plus. It is known as touch disease and requires the touch IC to be removed and a small jumper wire soldered. This is why you have to warp your phone as the trace and pad under the IC has lifted.

If your phone is not charging and it is a new battery it could be your charging dock but it is most likely an IC on the logic board known as (tristar) it is one of two charging IC’s and is often the cause of the problem you are having.

No part needs to be replaced. This is most likely a baseband CPU issue. On the iPhone 6 you need to remove the baseband IC and run a jumper wire then re-ball and install the IC. This problem happens as the trace involved is on the flex line of the logic board and gets severed due to flexation. You can confirm this by imputing *#06# into your keypad if it doesn’t bring up your IMEI number you have most likely found the problem.

What you read on reddit could be true. There is an option in 3Utools that you can click that says restore retaining user’s data. I haven’t tried this for about 12 months so don’t hold me responsible if things go bad but I don’t think you have any other option and would be worth a try. What happened when I tried this is it didn’t restore the phone I think it downloaded something and after some time the phone booted to the passcode screen I entered the customers passcode and it rejected it and went back to iPhone disabled. I don’t know if it was the correct passcode as the customer was not 100% sure.

It might not be detecting you keyboard and touchpad. Try connecting an external keyboard and or mouse so you can diagnose further.

You will need to remove the audio IC .06A would point to a VDD_BOOST problem most likely under the audio IC. I have had a few of these returned and that has been the problem. I have put it down to faulty IC chips as it was the same batch of IC’s that were involved.

Yes the board has two layers. It is connected by what we call an iterposer board. When you separate them the interposer board stays on the bottom section of the logic board as the solder compound used on the top of the layer is of low melt. Depending on how successful you are at removing the top layer will determine if you need to re-ball it or not. If the phone is water damaged more than likely some of the solder balls will have oxidised so you would need to wick the interposer board and re-ball. There are also spacers on the interposer board which if removed makes it difficult to solder the top board back on.  It is not an easy job to re-ball the interposer board. You need the right type of solder and plenty of practice. If you are getting into board repair with the iPhones it is essential that you learn how to take apart these boards and put them back together.  A good way to practice is on iCloud locked boards. Once you are competent you can move on to customer boards.