cheesestraws
Well-known member
I did know about the Plus analog board having a live heat sink but I wasn’t aware it’s still the case in modern PSUs too.
This kind of thing is why there are stickers on enclosed PSUs telling you not to take the enclosure off, and why you should always assume that anything could be live inside the PSU. Random bits of board-attached metalwork may be required, by the design of the PSU, to be live.
In any case, I guess OP should assume the worst when it comes to that power supply - I get the feeling it hasn’t been powered up for a long time.
I mean, yeah, but it's a relatively small PSU so probably the worst it'll do is catch fire. If I were OP I'd be inclined to power it up attached to a non-computer load on the end of an extension lead so I can turn it off if it does catch fire. I think you might be slightly over-worrying here.