A weird problem with Kolink PSU

[Hopsi]

A newbee here. Glad to finally register on the website because I'm experiencing a problem on my own, all I've done so far was reading the other threads.

So recently I got my hands on a Kolink Continuum 1050W PSU. But there is something wrong with it. After I turn it off (switch off+c13 cable disconected) (we are talking about the clip trick) 3.3V and 5V rails keep the charge and it starts to discharge very slowly (like a fan it takes more than 3 minutes to reach 0,00V). The PSU fan keeps spining for more than a minute before turning off.

Any idea?

Thanks

 

[Hopsi]

From what I've read the PSU question should be decent at least.. I do have other power supplies at home but I'm just wondering if someone has any idea what the problem could be.
https://www.kitguru.net/components/...k-continuum-kl-c1050pl-1050w-platinum-review/
https://www.jonnyguru.com/blog/2017/06/12/kolink-continuum-1050w-power-supply/6/