Same symptoms with exact model donor display.
Have been troubleshooting the backlight circuitry for days and even replaced the driver IC a couple times. All voltages look good but no 12v to 40v boost.
I DO get a backlight and video output with a donor 13" A1502 screen attached. Obviously all voltages are OK and I'm getting the 40v boost.
With patient 15" screen attached to the 13" A1502 I pulled the donor screen from, I get backlight and video output. I am hoping for suggestions on where to go from here.
Have been troubleshooting the backlight circuitry for days and even replaced the driver IC a couple times. All voltages look good but no 12v to 40v boost.
I DO get a backlight and video output with a donor 13" A1502 screen attached. Obviously all voltages are OK and I'm getting the 40v boost.
With patient 15" screen attached to the 13" A1502 I pulled the donor screen from, I get backlight and video output. I am hoping for suggestions on where to go from here.