Lcd brightness and nothing showing

hi.
i have a couple of problems with my LCD. the first problem was that i was never getting more than minimum backlight on the display, the display was usable but not really in bright environments. i swapped the inverter board and lcd panel but this didn't fix it.
anyway i persevered with this problem but yesterday the display stopped showing an image... it was still backlit (at minimum brightness) but didn't show the desktop. it works via an external screen however.
i took the LCD apart and checked the connections and all wires are intact and plugged in correctly... they were - any ideas guys???
before anyone suggests anything too obvious i am apple certified achds, acdt, acpt and was hoping someone could tell me what parts might be to blame from experience as i no longer have access to AHT.
thanks guys...

Hi,
If you've swapped out the lcd and inverter the only thing left is the logic. I would have to say that it must be something to do with that. Maybe there's an issue with the video / inverter connections to the panel which is why it works fine with an external display.
If possible I would maybe try testing it with a second known working lcd panel as it is possible that the one you used was doa. Or try testing them in another machine.
However I would say that it is likely to be the logicboard.
Robbie

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