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I have an A1267 display that does not display anything but will play through the speakers when my MacBook is hooked up. I replaced the led cinema logic board but no help. Does the power supply operate the screen ?
do you see a faint image on the screen when its black? you may need to shine a torch on it to be sure, as it will be very faint… also, check in the system profiler of your machine to ensure it is being recognised as a screen (under the graphics tab) The power supply is required to power the screen, so if it is a capacitive problem, it could be the cause of the fault, but its more likely to be the LCD panel, but it really depends on the exact symptoms, and what faults it showed before it failed. if you can provide more details, i can provide better information for you
I have the same problem. I check all the power component on the logic board and everything is ok. Then I made another test, unplugged the led panel (the 3 connectors one by one). When all the connectors are plugged -> no usb, so screen When I unplugged the power connector of the panel -> the sub works In any case, the screen does not appear on the pref panel Update It seems that the lcd panel is guilty
Thank you Jon Ridley for this info, i also have an apple led cinema display 27 check my screen and i see a faint image on the screen while is black i try raising the brightness but it doesn’t work, could this be the power supply?, the screen was working normally and today i find out this. Any suggestion will appreciated, thank you. Ariel
Hi all, just signed up here, because I found a way to get my 24“ Cinema Display back to life, which I have buyed yesterday. The Display had the following symptons: no ImageNo backlightNot recognized by MacBookUSB Working (iSight, Hub, Sound)Charging works
Looking closer to the logicboard, there were no burned spots or something else. So I checked up the power cable to the panel, all signals there. Then checked the signal cable to the panel against the Mini DisplayPort connector: Bingo, Plug detection signal was broken. The disconnection appears near the Mini DisplayPort connector. Buyed a Hama Mini DisplayPort to HDMI Adapter and cut the HDMI receptacle. Joined the new connector to the all in one cable from the Display… Boom, Image is there, all is Working. Here are the documents I have used to re-engineer the signal connection.
https://www.beyondinfinite.com/lcd/Libra…
http://pinoutguide.com/Video/mini_displa…
Hope this helps anybody.
Cheers, Johannes
