Should this transformer look ‘leaky’?

[u/squeeby]

A Unifi US-8-60W just died on me. It went offline and I went to reset it, the LEDs were on and it looked as though it was working fine. However when I unplugged it and plugged it back in again, there was nothing. No LEDs came on at all.

Had a quick look inside and noticed that the surface mount transformer appears to have some sort of black potting epoxy near the seams. The goop is solid and not sticky so I don’t know if it’s supposed to be like that or not.

I’ve found a few images online of this component and also of someone else’s bricked US-8-60W and they don’t appear to have the same goop.

Is there a way I can test this with a multimeter?

The power supply provides 48V 1.25A DC.

[u/Left-Method-1373]

It's not leaky they glue them to prevent rattling.