4 days ago I was able to mirror my galaxy a51 to my 43'' samsung tv. Have done this several times. Tonight I can't. I did an update check & a restart. It dosen't ''find the TV''. When I open the screen mirror on tv it says go to setting & if mirror or allshare is not there it is not compatible. The a51 is only 6months old. How can this be? Any help is appreciated.