[Solved] Z370 extreme 4 does not start

Hello everyone,

I decided to build a new system and set up everything according to the manuals. Now I plugged in everything and pressed the power button. Nothing happened. I consulted the troubleshooting guide of the PSU and disconnected it for 5 min. As I turned on the PSU again, the lights from the graphics card and the cooling device flashed on for a second before everything seems dead again.
I am desperate on how to get everything running.

My system
CPU: Core i7-8700K LGA1151
MoBo: ASRock Z370 extreme 4
PSU: AeroCool P7-650W Platinum
GPU: msi gaming X (GForce GTX 1080 Ti)
RAM: Corsair Vengeance LPX (CMK32GX4M4B4000C19R)

Thank you in advance.

C.D.Ward


Edited by CDWard - 24 Mar 2018 at 1:45am

Check your Clear CMOS jumper, if it is set to the "clear" position it will behave exactly as you describe. 

If the clear CMOS isn't bridged then I recommend you pull the board from the system and bench run it (on it's product box). There is a high likelihood you have a short between the board and the case. Basically your board's protections are kicking in and preventing power on, we need to alleviate every possible cause for this. If you still get the issue bench testing the system then it's time to pull the CPU and check for bent pins or warping on the CPU. 

Thank you for your help.

Xaltar wrote: If the clear CMOS isn't bridged then I recommend you pull the board from the system and bench run it (on it's product box). There is a high likelihood you have a short between the board and the case. Basically your board's protections are kicking in and preventing power on, we need to alleviate every possible cause for this. If you still get the issue bench testing the system then it's time to pull the CPU and check for bent pins or warping on the CPU.  Hopefully it's something as simple as a misplaced standoff on the case.

I tried this now. Unfortunately nothing changed.
Do you have any more ideas?

I suspected the PSU as well as the motherboard, so I simultaneously got in touch with the support of the PSU manufacturer. Unlike you, I received no response from them yet. So big thanks to you.
I also finally got a second PSU from a mate to test. I only connected the 24 pin ATX plug and turned it on, and all the lights on the mobo went on. So it should be the PSU.
Thanks again for your help.


Edited by CDWard - 24 Mar 2018 at 1:53am