Hello, I just replaced display on my iPhone 6s Plus and I did not disconnect battery and then I found that some components were burnt after finish. There is problem with display shadow in top left corner. Do you think it is just problem in these components or it is also damage backlight IC? Thanks
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The iPhone 6s plus has two backlight circuits it would be hard to say what component has failed without examining it under a scope. I would rule out the screen first.
The most likely component if not the screen would one the filters. When the filter becomes faulty after electrical damage it usually takes the pad with it so not only will you need to replace the filter but I suspect you would need to run a micro jumper.
Two of the filters look alright. There is another filter on the other side of the connector that’s coated over. You will need to remove the coating. The other components are on the other side of the board. This is an easy circuit to diagnose if you have a multimeter and board view software.
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Thank you for answer. I will download this view board software. What is possibility that just filters are damaged and not IC? And is it possible to change these components when mainboard is assembled in back cover by microsoldering tip? Thank you
@polo123456 If you have ruled out the screen you would than check the diode readings of pins 2, 4, and 6 on the connector. One of them will most likely be open you would then need to follow the line to the faulty component. You will need to remove the board before putting any heat on it.
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