I am sure you already seen this thread:
Mine did that at first also. But the battery was dead and charged it and came back on after a few tries. I thought it was a goner also… but after a few tries it was good.
I love these Emlid Reach RS units, but you do get what you pay for I feel. When I say that, there are features of the big dog GNNS receivers I wish the Emlids had…i.e. removeable battery, some have (2)!
I think the NEW “PLUS” versions show the power light on when charging, which is dumb the non-PLUS do not have… you’d think a firmware upgrade could easily implement that? Either way, plug it in and open ReachView and see if it indicates charge if somehow? Reboot, power down etc? probably won’t until it powers and connects…but worth a shot.
What irks me the most is USB micro-b connection. That type is so unreliable after constant use, either cable itself or connector, then it’s all over. Would be nice if everything was micro-c by now.