The logic board of the iMac (21.5-inch, 2017), model A1418, 2017, 21.5-inch (standard display). 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. Info '2017 4K' changed to '2017, standard 1920x1080 display (not 4K)'; identifier iMac18,1. Beetstech: PPN 820-00629-A, 820-01069-A, 820-01069-B, 'only compatible with the iMac 21.5" A1418 (Mid 2017) with standard 1920x1080 resolution display', compatible iMac18,1 Mid 2017 MMQA2LL/A and MHK03LL/A (2.3GHz Core i5), Apple parts 661-02290 (HDD) / 661-02291 (SSD); eBay 'Original Apple Main Logic Board 820-00629 2,3 GHz i5 für iMac 21,5 A1418 2K 2017'; Amazon 'A1418 Logic Board for iMac 2017 2k 21-inch 2.3 GHz 2-Core i5 Intel Iris Plus Graphics 640 820-00629-A, 661-02290'. The Retina 4K 2017 board is 820-00597 (see that row); the two CSV rows have their variants swapped. 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.