Micro Br says no card when I try all of my previously working and formatted cards Thanks for your help in advance

Inspect the card connector for BROKEN off pins or damage to the connector where the card goes. Not sure what type card this takes, but pins that get pushed back in on CF cards are NOT that uncommon, especially if card has had an attempt to put in backwards.

Beyond that I am afraid the cause would be unknown.

You MIGHT try formatting a new card... If it won't go, something in the interface has gone bad.