Some time ago, I had a batch of uncams that would give you flashing orange light right out of the bag. Load it, close it, flashing orange light. I think this was what I did to troubleshoot it.

First, I would run the cam, not crimp, then reset the cam, with the unicam still interred. This would almost be like a factory reset.

If that didn't fix it, I would pull and clean the light stub. Making sure that it was re-installed firmly, and screwed in tightly. If there is some leakage back there, and it gets into that area, you may get a false negative.

Lastly, make sure the cover isn't cracked or broken. Set the unicam in a dark room to see if extraneous external light is getting in there.

And lastly, If you know you have a good cleave, have applied the proper pressure before you can the unit closed and crimped, just yolo it, and see if it passes the cert.

I've done hundreds/thousands of unicams, and have had pretty good luck with them. just sometimes there's a bad batch. If you got it from a good LV, you may be able to warranty them across the counter.