How to make sure the power supply for a home server is safe?

Question

Electronics

Hello! There is a home "server" (on a mini itx board), which is powered by Chinese pico PSUs and an external power supply (like a laptop one). There are doubts about the electrical safety of this power circuit. Visually, the power supply elements are in order, the Chinese power supply tester shows green lights.
How to make sure that the power supply is more or less safe? There is a multimeter, but knowledge of electrical engineering is lame.
Why I ask - at home UPS Ippon burned through the furniture, now it's somehow scary.

Answer 1

external power supply (like a laptop)

the whole question is in this "laptop".
1. He's not quite NoName?
2. Measure its temperature at the working (it is desirable even loaded) "server". If the hand does not burn, then it is good. If it burns, then it would be good to look for a more powerful replacement.
3. Does he have a plug with a grounding contact? Is the outlet it is plugged into grounded? Half of the dangerous situations with electricity are solved by protective grounding.

Answer 2

Any, even branded, PSU can overheat (and not only PSU), just the risk is less.
The only more or less reliable way to ensure the fire safety of an electrical installation is to place it in an iron box, as thermally insulated as possible from combustible substances. And put an automatic fire extinguisher in the box, of which there are many varieties.
And now the cons:
- appearance (solvable, but more expensive)
- the space occupied increases
- heat dissipation becomes more complicated (solid, but more expensive)
- the risk of abnormal operation of the automatic fire extinguishing system and damage to equipment
- the need for periodic inspection / replacement of elements of the fire extinguishing system (they usually has an expiration date)