Good evening everyone,
the device in question is a iMac 21,5 pollici "Core i3" 3.06 (mid 2010) - A1311
I replaced the video card because it no longer did its job, with a new one. Unfortunately it gives me black screen, the backlight is present, if I connect an external monitor everything works regularly. Then I also replaced the backlight inverter board but there were no changes. I then tested the LED strip of the screen and it is O.K.
What I noticed at the completion of the start-up procedure is a screen turning on that lasts a second and then if I put the iMac in STOP from the power switch and immediately after I press it again the display, after a few attempts it turns on and stays on without problems.
But if I turn it off the problem shows up again on the next reboot.
The LVDS cable is O.K.
I have read and tried various reset procedures without success.
I ask the forum for help and advice to understand what it could be or what I need to check further.
Thank you
Paolo
the device in question is a iMac 21,5 pollici "Core i3" 3.06 (mid 2010) - A1311
I replaced the video card because it no longer did its job, with a new one. Unfortunately it gives me black screen, the backlight is present, if I connect an external monitor everything works regularly. Then I also replaced the backlight inverter board but there were no changes. I then tested the LED strip of the screen and it is O.K.
What I noticed at the completion of the start-up procedure is a screen turning on that lasts a second and then if I put the iMac in STOP from the power switch and immediately after I press it again the display, after a few attempts it turns on and stays on without problems.
But if I turn it off the problem shows up again on the next reboot.
The LVDS cable is O.K.
I have read and tried various reset procedures without success.
I ask the forum for help and advice to understand what it could be or what I need to check further.
Thank you
Paolo
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