Intel Motherboards : Z170MPro - No Beep, No Screen, Just Fans,Reboot 3s

Author: GreatFullTekeek
Subject: Z170MPro - No Beep, No Screen, Just Fans,Reboot 3s
Posted: 12 Jan 2017 at 10:42pm

COMPONENTS
MOBO: NEW Asrock Z170M Pro 4S
CPU: NEW Intel   I5 6400 + Boxed PWM Fan (but i also have a BeQuiet PWM)
RAM: NEW Viper4 XMP2.0 D4 16GB 3000-16 (2x8GB plugged into A2 B2, or single in A1)
SSD: OLD Crucial CT250BX100SSD1
GPU: OLD Asus    GTX750TI-OC-2GD5
PS:   OLD Be Quiet 600W
A connected PC-Speaker (2 different types)

Problem:
When powering up:
1.PS Fan starting
2.CPU (PWM) drive high for 3 seconds, then reboot..
3.CPU (PWM) drive high for 3 seconds, then reboot..
4....
The connected PC speaker dont beep @all (tryd different speaker types!)

Case 1:
GPU Onboard (PCIe card removed): There is no Signal on HDMI or DVI - never
(reboot after 3 seconds)
*It dont matter if i Plug in one two or none RAM or SSD anywhere - all variants tryed - change nothing on the problem.

Case 2:
a. GPU PCIe: There is no Signal on HDMI, DVI or VGA - never
but the MOBO dont reboot, the CPU and PS Fans are running.
*It dont matter if i Plug in one two or none RAM or SSD anywhere - all variants tryed - change nothing on the problem.


I also have removed the CPU and checked the contacts of the socket, they seems to be ok.
Since this is a new platform for me, i dont have spare parts to check alternative parts (like ram..) ... my last cpu/platform change was with the Intel Q9450

-mike