How to diagnose AHRS not healthy

I’ve done (and redone) both Accelerometer Cal and compass cal.
I still get the AHRS not healthy message?

Any suggestions on diagnosing this?
This is on a Matek H743 wing V3.

When are you getting this message? You will get it before the GPS has a proper lock on the ground and it’s pretty normal. If you get it in flight that’s more serious and you should post a log so we can help figure out what’s wrong.

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I had similar behavior after an upgrade that drove me nuts. But it disappeared in the flying field with good GPS lock.