If your Mac desktop isn't turning on, a replacement power supply maybe the answer.
This new 185W power supply is replacement for all iMac 21.5" computers with model A1418 and A2116
Compatible with iMac 21.5 inch A1418 (Late 2012-Mid 2017): iMac13,1 Late 2012: MD093LL/A or MD094LL/A,iMac13,1 Early 2013: ME699LL/A,iMac14,3 Late 2013: ME086LL/A or ME087LL/A,iMac14,4 Mid 2014: MF883LL/A,iMac16,1 Late 2015: MK142LL/A or MK442LL/A,iMac16,2 Retina 4K Late 2015: MK542LL/A,iMac18,1 Mid 2017: MMQA2LL/A,iMac18,2 Retina 4K Mid 2017: MNDY2LL/A or MNE02LL/A
Compatible with iMac 21.5 inch A2116 (Early 2019): iMac19,2 Retina 4K Early 2019: MRT32LL/A,MRT42LL/A or BTO
Identifying Numbers: APN : 661-7512, 661-08259, 661-7111 PPN : 02-6712-6700, APA007, ADP-185BF
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Note: Products with electrical plugs are designed for use in the US. Outlets and voltage differ internationally and this product may require an adapter or converter for use in your destination. Please check compatibility before purchasing.