a1466 no boot no display
i have a macbook a1466 with no boot no display it has fan spin amber to green light. board is clean i already flash its bios no luck still no boot no display even chime sound. when i check on display light ways i figure out it has 0 volt F7700 is good 8v out, in d770`1 c7797 c7799 to j8300 pin3 and pin4 0volt out. history it only close lid when mac still on till battery comes out empty. when it turn it on no display no boot. i used to fix some of this but in corroded part at u1930 so i replace it and it works normally this one i tried to replace it but no luck. is there possible why this mac doesnt post or boot. what i miss something?
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Follow this flow chart:
https://logi.wiki/index.php/G3_to_S3..._and_Broadwell
Remove all power. Measure the resistance to ground of the fuse. Testing if there is a short on the ppbus_g3h power rail.Last edited by mon2; 01-28-2026, 05:48 AM. -
Way too little info. Is it a 820-00165 or 820-3437 board for a start. Do all power rails come up including CPU Vcore? Is it POSTing or not (use a USB with a LED or Chipmunk to see if port is being probed). Backlight wont be enabled if no display is detected so it's meaningless on the bench.Comment
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