Chosen Solution
I have a broken logic that appreantly powers on. However I don’t have a complete laptop to put the logic board in. I tried plugging a MagSafe up and display port to the board and a hard drive with the connector. When I short the pins up the board powers on no display then the fans go max. I just found out that the fans will go max if no trackpad is connected which it isn’t. Is there anything else I need connected to the board to get it running.
No need to bother about the fans..if screen doesn’t light up at boot you either have a no image or a no backlight issue. However you should see the question mark folder shining a torch light to screen if it’s just a backlight fault. If you don’t have backlight or an image, matter is complicated enough in any case..if you’re not a pro it would take you days or more to figure out what’s faulty..
