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I have been refurbishing iPhone 8 screens recently. Got my first one spot on, no dust, bubbles or glue etc. Plugged it into an iPhone 8 and works perfectly. Continued to install the heat shield, home button and camera flex etc ready to be sold and then all of a sudden it started ghosting? I thought it could be shorting the board somewhere so I applied some sellotape to the heat shield where Apple has some adhesive, left it a while and came back to it. Now 3D Touch does not work (it was before) and the screen is still ghosting! Ahhhhh!! Any help will be greatly appreciated. I have also updated the software to the latest version. refurb business is so tricky!
That’s just how it is. The screen has to be individually calibrated, without the original Apple calibration machine, you can only hope for getting a screen that matches your device’s electrical and mechanical properties. And with iPhone 7 and later, the issue is much worse because different suppliers manufacture screens with very different performance ranges. You are much more likely to install a screen that has different characteristics from the original one the device came with, and you don’t have the tools to recalibrate it.
You might want to try a Refurb group on Facebook…lot’s of qualified folks on those to help out. This forum tends to have very few active refurbishers.
