PC not booting

[FreshKD21]

Hey, i have a friends pc over because he told me it didnt work, it seemed like the cpu isnt getting any power (no debug leds are lighting up just the ambient leds) no fans are spinning either. I tested the CPU (i7 6700K) and RAM (G.Skill TridentZ) both are working in my system, we swapped the motherboard (Asus Z170 Pro Gaming) for a completely new one i just noticed that the fan of his be quiet PSU isnt spinning (which it should!) But this doesnt seem to be the problem either as i hooked his motherboard up to my PSU. Please i need help because i dont know what else it could be i literally tried everything i know

[Rhaemond]

Some PSU nowadays don't spin their fans unless they are handling very high loads so that's pretty much normal. Could this be some incompatibility with the parts itself? Because, as you've mentioned, all of the parts work well when tested on other rigs. 

[Caennanu]

As you seem to know what you're doing, ill dive right in.

 

does the MB boot when having your cpu and memory in it?

Are there any bent pins on the sockets?

Is there maybe a short circuit on the back of the board?

[FreshKD21]

23 minutes ago, Rhaemond said:

Some PSU nowadays don't spin their fans unless they are handling very high loads so that's pretty much normal. Could this be some incompatibility with the parts itself? Because, as you've mentioned, all of the parts work well when tested on other rigs. 

 

18 minutes ago, Caennanu said:

As you seem to know what you're doing, ill dive right in.

 

does the MB boot when having your cpu and memory in it?

Are there any bent pins on the sockets?

Is there maybe a short circuit on the back of the board?

Thank you both for your help (the PSU i was talking about is from be quiet which doesnt allow the fans to stop, ive come to the conclusion that the PSU is dead) and now what my solution was: i connected the power button.... Yeah i know sounds dumb, ive tried powering on the motherboard with my screwdriver by shorting the pins (and yes i know which ones to short) and for some god damn reason this motherboard just doesnt like my screwdriver this is the first time ive needed a power button connector

[Caennanu]

haha so all resolved now. Dead PSU and shorting is futile? :d