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...

Disconnect the top flex cable and seat the screen if it boots it will confirm a faulty top flex assembly and it will need to be replaced. This is the most common cause for the 7 series to boot-loop.  If it is not the top flex assembly it will be one of the other flex cables causing it, most likely the home button cable. The bottom cables cannot be replaced and require a replacement screen.

This can easily turn into a rabbit hole especially if you start replacing components. For an iPhone 8 with this symptom I would first check the connector, it might look all right but I have been trolled by this once before. Have you got your iBridge yet?  Second from experience I would remove the CPU shield and check the CPU coils for cracks. Then put pressure on the CPU and see if image appears. Remember the touch connector has a couple of image lines to. I would also check the proximity line as I have seen this pull the image down upon finished boot. Finally check you are getting your display boost “PP6V0_DISPLAY_BOOST” Could be a problem with chestnut. Good luck.

You will need to try a replacement screen. The flex on the one you are using could have been bent too much when removing and installing it. Make sure you replace it with an OLED screen and not LCD.

If the suction cup will not stay on because the screen is damaged you will need to use a thinner pic then insert the one you have.

Have you tried a known good screen?  What is the phones history? You should not have touched chestnut. Now you have added variables to your repair. I have measured different voltages on that line and yours is acceptable. You need to diode the connector and find what line is missing. If all the pins measure right I would try another meson than cumulus.

If you have brought a bulk lot of phones you will need a known good working device for each model. You then need to try the logic boards out in the known good housings. This will completely rule out parts as I wouldn’t trust the batteries screens and flex assemblies that came with them.

This seems strange as the problems you are facing are on different circuits. I would check the logic board connector and the components around it under some magnification. The power button works by shorting this pin to ground. Try this with a pair of tweezers to rule out the buttons and flex.

As long as you disconnected the battery before removing or replacing the other connectors your logic board should be fine. You have another iPhone 6s so you can rule out the logic board by installing it in the other housing. That is what we would do. But being a 6s if you didn’t disconnect the battery first before removing the other connectors I think you will find that it is a damaged backlight circuit on the logic board

This is not a signature fault so we cannot say what the problem will be. You will need to rule out faulty parts. ·         Battery. ·         Dock flex assembly. ·         Front camera flex assembly. ·         Screen. ·         Rear camera. If it is not any of these parts that is causing the problem it will be a logic board issue.

This will defiantly be a parts problem. The most common parts to cause this are. ·         Dock assembly. ·         Front flex assembly. ·         Battery. ·         Screen. You say your phone is now looping so I would first rule out the screens front flex assembly by disconnecting it. If that is not the fault you will have to rule out the other above parts.