please help diagnose tweeter problem

hello, i have a pair of meadowlark kestrel 2's and one of the tweeters recently stopped working after a move.. there's no hiss or static, it's just dead

i'm wondering if anyone knows what might have caused this, are any tests i can perform to confirm it's dead? could shipping/moving the speakers have caused a wire to come loose?

also, i've never replaced a tweeter before but if i order a replacement, how easy is it to replace the tweeter? do i just unscrew the original unit and solder in the new tweeter?

should i be replacing 2 tweeters at once so they have the same "burn-in"/time on them or does it not matter?

thanks