Ray, sorry for the delayed response…Took unit out today and here are the picture of the contacts, they look good. Took card out, put it together and turned it on, now it works w/o the SD card… Wondering if this is an intermittent problem, contacts on the inside of the slot itself? If you have any continuity or voltage checks you can share if the problem re-appears, I will appreciate it (I am an electronics eng). For now I go back to my eng and tech basis: “if it ain’t broken, don’t fix it” 🙂