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My iMac is A1418 2013 MF883 LM215WF3 (SD)(D1) 21.5".
I installed new screen display and have same issue
I shine a flashlight at an angle at the display and see the faint image of the desktop and icons. How do I fix the backlight?
Which is it? The CFL's or the power inverter on the iMac 21.5" 2013 model.
Thanks
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This model uses LED's for the backlight and the power is supplied via a ribbon cable from the logic board.
Review this IFIXIT guide: iMac Intel 21.5" EMC 2805 Display Replacement. Jump to Step 20. Make sure the cable is correctly inserted.
Use a magnifier to inspect the pins of the cable and the socket as they could be damaged. If they look OK, you'll need to do a detailed inspection of the logic board as something has likely blown.
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