Cant Exit ODIN MODE (MULTI CORE DOWNLOAD) is common problem in Samsung J1 Ace Family (SM-J110G/F/M/L) with SK Hynix eMCP.
Case : Samsung j1 Ace (SM-J110G)
Failed eMCP : SKHynix eMCP BGA 221 H9TQ32A6BTMCUR-KTM 4GB
Replace eMCP : Samsung KMRX1000BM-B614 32GB
Known eMCP supported : Samsung KMF7, KMQN, KMR31, KMR82, KMQ31, JTMC
UFI featuring easy Resize User Data & Realign Partitions
https://www.youtube.com/watch?v=Jcl56mwcDVU