The logic board of the iMac (Retina 5K, 27-inch, Late 2014), model A1419, 2014, 27-inch Retina 5K. Known faults are being collected.
No guided tree is live for this board yet. The profile, the viewer and manual entry are there on the free plan, and the first sessions on it build the tree.
Checked on 2026-10-29 against 2 sources: corrected. Year 2015 changed to 2014 (first year) and info 'Mid 2015' widened to 'Late 2014/Mid 2015'. Beetstech lists PPN 820-5029-A together with 820-4652-A as the board for the Late 2014 (MF886LL/A, BTO 4.0GHz i7) and Mid 2015 (MF885LL/A) Retina 5K iMac15,1, and usedmac sells an 820-5029-A 4.0GHz i7 board as 'Works in: iMac 27 A1419 2014 Models'. No source restricts it to Mid 2015. Revision A is a placeholder until Studio records the real revisions.
Open the board in NextProbe, answer the symptom questions and follow the lit point. The free plan includes three guided sessions a month. Your own boardview and schematic stay on your machine.