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 will need to replace your charge dock flex assembly. If it still will not connect to your PC or charge it will be a faulty component on the logic board.

Here is J6400. I don’t know where you got J4101 from. If you are trying to sort out a charging problem you are looking in the wrong spot.

You will need to re-ball the baseband CPU but being the Qualcomm model the baseband will probably be shorted internally. If it is you could try burning the short out but it doesn’t have a good success rate. If the keypad brings up the IMEI you might just get away with re-balling the BBCPU.

It depends on where you are selling it. I never use wireless charging and no one I associate with does but you will have to weigh up say $150 to get the charging working to what you will get with it not working.

You need to determine if it is a parts problem of a component on the logic board. ·         Can Siri hear you? ·         Will voice memo let you record? If voice memos will not let you record you most likely have the signature audio IC fault which occurs on the 7 series. This repair requires microsoldering. If voice memos let you record and Siri can hear you I would start by replacing the dock connector. and front speaker flex assembly.

There is no way of knowing what component has been damaged from the dent. The only thing you could try would be to rule out parts. Try a replacement battery and screen and make sure all the connectors are sitting firmly, other than that you would need a multimeter and DCPS to find the faulty component.

·         Did you replace the battery after you purchased it? ·         How many amps is it drawing when charging? ·         What does 3uTools say about the battery and its health? You will need to rule out parts. Try another battery and dock connector. If it is indeed fake charging I would replace Tristar.

If the screen responds to touch it is more likely a backlight problem. Shine a torch on the screen and see if you can make out an image. If you can there is most likely a faulty component on the logic board backlight circuit which would require microsoldering to repair.  This shouldn’t have occurred if you disconnected the battery before doing the screen replacement so I wouldn’t rule out a faulty screen that has ended up damaging one of the backlight components on the logic board.

Sometimes you have to move one flex behind the other but since you should also bring the camera flex assembly over from the old screen it is not too much trouble to sort out. Changing the screen should not have affected the charging. The only circuit you should have touched on that would be the battery. Check the battery connector and the charge port connector. Does your PC recognise the phone? You shouldn’t have a light area on the screen.  You have purchased a really cheap screen for this to happen.

Going by the information you have supplied I would first rule out a faulty tristar IC. There is a data line to the CPU from this IC. The phone might still charge but if the battery was bulging there is a good chance it damaged the tristar so replace it and see if it will update.