PC wont work right with new CPU

[MichaelK03]

So I just bought a new I7 8800K CPU and when I installed it my PC's lights and fans would turn on for a second or two and then turn off they would do this every time I pressed the button and after around three-four times my PC would turn on but nothing would happen on my monitor. when i put my old I5 6600 back in it worked fine how do I fix this. 

[Crunchy Dragon]

You need a new motherboard.

 

You can't use anything below B360, H310, or Z370 with an 8th Generation CPU.

[Docretier]

2 minutes ago, MichaelK03 said:

So I just bought a new I7 8800K CPU and when I installed it my PC's lights and fans would turn on for a second or two and then turn off they would do this every time I pressed the button and after around three-four times my PC would turn on but nothing would happen on my monitor. when i put my old I5 6600 back in it worked fine how do I fix this. 

You don’t, only gen 6 and 7 can be exchanged, you need a board that has a gen 9 chipset.

[3 Lions]

A 300 series board is need for Coffee Lake to work.