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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

Stage Lights Again... 4 Screens

MBP 2012 13" A1278 (820-3115)

We have replaced the LCD Connector, and tested with 4 different complete known to be good display assembly's and we still have these 'stage lights', which must point to the issue being from elsewhere. @oldturkey03 any suggestions on what we can do next?

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@livfe part of the backlight IC U9701 connects the cathode part of the LED strips to ground through PWM-controlled FETs. LED_RETURN_1 through LED_RETURN_6 lines are present on the LVDS connector (pin 24-Pin 29). A broken line on those will cause the anomaly we refer to as "Stagelight." :)

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Block Image

Here are the resistors for the LED Return lines

Block Image

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This is a contender for "Answer of the century", ,We will check the later today and I am very confident that your help will solve this one (& others hopefully!) & will get the attention it needs to help many save from buying unnecessary parts- Vielen Danke :D

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