ADXL burnt out?

At what point can I conclude my ADXL is dead? Is there a way to test? I have wired a harness to test the board using an extremely short Ethernet shielded cable and still get the (got ff vs e5) error.

I don’t think I have ever once been able to get an ADXL to work, how unreliable are these cheap boards? Should I just order a 3 pack and hope for the best?
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