AlfredoM Posted October 23, 2023 Share Posted October 23, 2023 (edited) iMac late 2015 Logic Board Problem Short version: Logic board after diagnosis with D key Result: SMC chip probably defective Error: PMF006 Bought a used logic board, firmware password in it and unknown. AASP Apple Service cannot unlock due to lack of proof of ownership (invoice or proof of purchase). Ask: If you remove the EFI chip in the iMac, is it possible to start the iMac with an EFI Partition in the Harddrive, like with a Hackintosh? Edited October 23, 2023 by AlfredoM Link to comment https://www.insanelymac.com/forum/topic/357889-imac-late-2015-27-inch-logic-board-problem/ Share on other sites More sharing options...
Slice Posted October 23, 2023 Share Posted October 23, 2023 I think yes but it is large field of testing. You should somehow exclude native SMC from whole work. 1 Link to comment https://www.insanelymac.com/forum/topic/357889-imac-late-2015-27-inch-logic-board-problem/#findComment-2812714 Share on other sites More sharing options...
AlfredoM Posted October 23, 2023 Author Share Posted October 23, 2023 (edited) 6 hours ago, Slice said: I think yes but it is large field of testing. You should somehow exclude native SMC from whole work. how could I do that? An EFI folder would also work in the iMac late 2015 with 27 inches because another logic board has a firmware password in it, which is unknown. So I mean remove the EFI chip on the board and boot with OC like a Hackintosh, would that be possible? Edited October 23, 2023 by AlfredoM Link to comment https://www.insanelymac.com/forum/topic/357889-imac-late-2015-27-inch-logic-board-problem/#findComment-2812724 Share on other sites More sharing options...
Slice Posted October 24, 2023 Share Posted October 24, 2023 What is happen if you just try? Link to comment https://www.insanelymac.com/forum/topic/357889-imac-late-2015-27-inch-logic-board-problem/#findComment-2812730 Share on other sites More sharing options...
AlfredoM Posted October 24, 2023 Author Share Posted October 24, 2023 They're good... I can't just do something like that at random, so I'm looking for advice from an expert who may have done something like that before. Besides, I don't know what an iMac 2015 needs for an open core, etc. There are so many unanswered questions. Link to comment https://www.insanelymac.com/forum/topic/357889-imac-late-2015-27-inch-logic-board-problem/#findComment-2812746 Share on other sites More sharing options...
Slice Posted October 24, 2023 Share Posted October 24, 2023 Make USB stick with Clover EFI. Config.plist let be default. Boot from the USB and press F2. You will get preboot.log in USB/EFI/CLOVER/misc folder. Link to comment https://www.insanelymac.com/forum/topic/357889-imac-late-2015-27-inch-logic-board-problem/#findComment-2812747 Share on other sites More sharing options...
AlfredoM Posted October 24, 2023 Author Share Posted October 24, 2023 If the EFI firmware password is locked, I can't boot anywhere, not even with a USB stick Link to comment https://www.insanelymac.com/forum/topic/357889-imac-late-2015-27-inch-logic-board-problem/#findComment-2812748 Share on other sites More sharing options...
STLVNUB Posted October 24, 2023 Share Posted October 24, 2023 Thread Should Be In Apple Section, This Is For HACKINTOSH Link to comment https://www.insanelymac.com/forum/topic/357889-imac-late-2015-27-inch-logic-board-problem/#findComment-2812749 Share on other sites More sharing options...
Slice Posted October 25, 2023 Share Posted October 25, 2023 15 hours ago, AlfredoM said: If the EFI firmware password is locked, I can't boot anywhere, not even with a USB stick So you can do nothing? What is the question? Clover can boot is legacy mode without EFI if this is the question. Link to comment https://www.insanelymac.com/forum/topic/357889-imac-late-2015-27-inch-logic-board-problem/#findComment-2812781 Share on other sites More sharing options...
Recommended Posts