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HI Iphone 6 PCB 820-3846A J2019 Connector on PP5V7 LCD AVDDN CONN was 0L. Changed U1501 and U1503 ow Diode value Reading is OK but still screen Black Changed FPC Too just in case , same thing Can any one help me in this case ? Thanks in Advance
Do you mean PN5V7_SAGE_AVDDN or PP5V7_LCM_AVDDH; the rail you mention does not exist. It’s quite common for the PN5V7_SAGE_AVDDN to read OL so if that’s the case, I wouldn’t worry about it. Did you check all of the connector pins or just some of them? When dealing with a dark/black screen, you need to insure everything reads okay and when possible, measure the actual voltages as well. You can get the QIANLI iBridge Test Cable to help you troubleshoot these kinds of issues.
