Chris Stables

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...

If your iPhone cannot determine what charge is in your battery it will reboot every few minutes. ·         Check the battery connector is seated properly. ·         Replace the battery. ·         Disconnect the front camera flex and see if it re-boots. ·         Enable assistive touch than connect the new screen without home button of front camera assembly. If none of these things helps, you most likely have a problem with a charging IC on the logic board.

This is defiantly a screen problem. If the screen is not damaged take it back and show them the problem. If they are a reputable shop they will gladly replace the screen for you.

You cannot separate the front assembly. If they will not let you black the front camera out you will have to cut the flex before the camera. The sensor and earpiece speaker should still work.

On the Qualcomm boards this problem starts at the BBPMU from flexation we presume as it is closer to the flex line than the Intel boards which don’t suffer from this problem. On the Qualcomm boards when the BBPMU IC fails it usually sends a higher voltage to the BBCPU which cannot handle it and develops a short. I wouldn’t spend too much more time on this phone unless it has had the audio IC repaired which I would than remove and re-ball the BBCPU. Don’t rely on the ZXW readings always compare to a known good board.

3uTools has an option to set the phone up. It is a free program and works on windows.

I doubt very much these lines are shorted. These are very low resistant lines so if you had your multimeter on continuity mode they would indeed beep. Also 180 degrees would melt the balls on the interposer board but would not be hot enough to cause bridging under any IC. Continue with your original repair. I usually just remove the top board and check for oxidisation or cracked solder balls then put it back on with your heater. This most likely will bring back the Wi-Fi if not you are in for some pain.

You need to check the home button cable that goes from the screen to the motherboard. Check under some sort of magnification for a small tear in the flex, it usually occurs at the 90 degree bend.

It sounds like the turtle IC on the home button assembly has become faulty. I use to try and reflow or replace them but now I am advising customers to get apple to replace the screen and home button. If you have a business near you that offers microsoldering you could see if they could help but a lot of them have stopped doing this repair.

The connector microphones are located on the charging port assembly. One of these microphones has become faulty. I am not sure which one handles the voice memo and speaker phone. Replace the charging port assembly and the audio should be fine.

This is a common problem with the iPhone 8 series caused by the ground pins at the end of the home button connector being pushed in. If you have some sort of magnification you should be able to pry them out into their normal position. Different screen manufacturers use a different Architecture. If those ground pins are pushed in it might only affect certain screens.