Question PC Won't even boot after replacing old CPU/Motherboard

[Prey_EU]

I previously had a ASUS H110M-R Motherboard with a I7-6700.

Today I replaced them with a MSI Carbon Z270 ATX Motherboard and a i7 6700k.

It won't boot at all, not fans, no black screen, nothing.

I don't know much about PC's but off the top of my head the issues I can think of that may be causing this are :

When I applied the Thermal paste I may have put too much on, and as this was my first time something may have gone wrong with the CPU fan during then.

The CPU / Motherboard were both used, and I asked the seller if z270 boards worked with i7 6700ks, as I wasn't sure they did.

Please help, anything would be appreciated.

Specs
:I7 6700k
MSI z270 board
Hyper 212 Evo cooler
WD Blue SSD
Samsung 1tb HDD
Cooler master HAF 922 case
Corsair 2400Mhz vengeance ram (1 stick, 8GB)

 

[PC Tailor]

Please see the following guide first: https://forums.tomshardware.com/thr...ng-about-post-boot-no-video-problems.1285536/

PSU make and model?

 

[Prey_EU]

Please see the following guide first: https://forums.tomshardware.com/thr...ng-about-post-boot-no-video-problems.1285536/

PSU make and model?

Sorted xD

It was either the +/- on the power on button

Or the I put the CPU power connectors in the wrong way

 

[PC Tailor]

Sorted xD

It was either the +/- on the power on button

Or the I put the CPU power connectors in the wrong way

CPU power connectors? Not sure what you're referring to exaxtly but it is more likely as the polarity of the PWR SW shouldn't make a difference either way.

Regardless, glad it's sorted!

 

[Prey_EU]

Sorry I was trying my best to explain, but essentially the cables that have CPU on them, that go from your power supply into your motherboard, I think I put them in the wrong way around