IMAC A1419 820-3478-A no backlight

Discussion in 'iMac' started by elitetek, May 31, 2016.

  1. elitetek macrumors member

    Aug 21, 2012

    I am currently repairing a imac a1419 that chimes however nothing is shown on the large display.Plugged it to an external monitor and it does show the flashing folder. It seems that the units backlight has been effected. I am familiar with replacing the fuses and LED driver on the macbook however I can't find the fuse for the LED driver. I located the LED driver HV9989 on the logic board and have taken a few pictures if anyone can help me locate it. Apple part number for the logic board is 820-3478-A.

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  2. gadgetech_jax macrumors newbie


    Jul 27, 2016
    Did you ever find a solution to this? We have the same one in our store now showing up on an external, but not the actual display, tried a new display panel without luck.

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