The logic board of the iMac (21.5-inch, Late 2013), model A1418, 2013, 21.5-inch, discrete graphics (GeForce GT 750M). 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: verified. Beetstech: PPN 820-3482-A, APN 661-7503/7504, iMac14,3 Late 2013 ME087LL/A 2.9 GHz i5 and BTO 3.1 GHz i7 (GT 750M); everymac gives ME087LL/A as iMac14,3, EMC 2742. An eBay listing: 'Original Logic Board 820-3482 3.1 GHz i7 GT750M for iMac 21,5 A1418 2013'. Apple's identify page groups the Late 2013 21.5-inch (ME086, ME087) under iMac14,1; the 2.7 GHz Iris Pro configuration uses a different board per listings (820-3588-A). Consistency review: variant extended from '21.5-inch' to name the GT 750M configuration (taken from the notes above) so this row is distinguishable from 820-3588, which carries the same model name, A-number and year but is the 2.7 GHz Iris Pro machine (iMac14,1). 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.