3 new cams, SD's not recognised on all 3

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I had this issue. Got a new cam today, and found the issue with my “bad” cam.

Different mini SD card problem

So, I just wanted to update this thread. After getting my replacement V2 this afternoon I opened it up to compare with the V2 that would not recognize the SD card, and my suspicion was correct. There was a missing component. In my case, labeled R65 on the board. Measuring in-circuit resistance of the good cam was about 5K, so I tore through my box of junk (all good electronic techs have a box of junk) and found an old bluetooth earphone (remember when we thought people were talking to themselve…