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...

More than likely the water has caused damage on the logic board. Try cleaning the connector and the surrounding components with Isopropyl alcohol. Other than that you would need the right equipment to diagnose the problem like multimeter, Broadview software and schematics.

You will not know for sure until you try and activate it but if it is still activated on the previous owners iCloud account there is nothing you can do besides contacting them or ask for a refund. Sometimes those sites used for checking IMEI show cached information.

Did you recently have the screen replaced? Siri uses the microphone on the front camera flex assembly. You may need to have it replaced.

Forget about the backlight until you have image. You said mainboard connectors all tested well. So you are getting ·         1V8 on pin 5? ·         5V7 on pin 1 and 3? What are diode readings of pin 7 and 9?

No they are not interchangeable. They have different size connectors and flex cables.

Lift the screen and put pressure on the bracket on top of the home button and with the other finger press the home button and see if it clicks. If it doesn’t click the home button you purchased is probably faulty. If it does click find a screw to replace the one that is missing.

There is not much you can do if you haven’t got the proper tools and equipment. First I would try another battery and double check your flex connectors. If they are all good you will need to find what power rail has become faulty. What you can do is remove the motherboard from the housing and check there isn’t any bridging between components such as a small screw or piece of wire. Other than that you will need someone who has the equipment and skills to diagnose the problem.

There is no quick solution for this. You need to find what is causing the USB connection to drop.

You should check the flex connectors are all seated properly. It does sound like a connection problem and the 11 Max is a layered board. The solder they use to connect the two layers in my standards is poor quality and the phone only needs a slight drop for the solder balls to crack and become oxidised. I think you will have to have it looked at by a reputable repairer who would separate the board, check the pads than re-ball it with some quality solder.

What is PPBUS_G3H with battery and without? If around 8.5V with battery and really low with magsafe check U7100 and Q7180 but probably Q7180 is bad.