Did I brick my RockPro64 somehow?

[snarfel]

I had a RockPro64 running on microSD just fine and forgot it was still turned on and tried to connect the eMMC to it. After popping out the microSD I noticed it wasn't booting on eMMC so plugged back in the microSD, however it no longer seems to boot fully on microSD anymore as well (e.g. my keyboard LEDs don't flash, no video output detected to TV).

Is it possible to brick the RockPro64 somehow by connecting a flashed eMMC while actively running off of microSD?

[dukla2000]

...
Is it possible to brick the RockPro64 somehow by connecting a flashed eMMC while actively running off of microSD?

I guess anything is possible - a very much uncontrolled situation. Although conceivably the eMMC is a removable media and so theoretically it shouldn't be a problem.

... it no longer seems to boot fully on microSD anymore ...

Does there seem to be some boot activity (onboard LEDs light etc)?
Perhaps the filesystem on the SDcard is (co-incidentally) corrupt?

PS - if you have left the eMMC connected then of course the boot priority is eMMC first then SDcard unless you do the secret jumper trick