Question Motherboard cpu light blinks twice, system doesn't turnon

[swiftsail]

Hey All. New build, Gigabyte auros Pro MB. Had it up and in Bios turned on cpu alarm, brought it down and plugged in the case fan into Ide power. Now Motherboard bebug cpu light blinks twice, system doesn't turn on. Light do flash on the MB when PSU is turned on. Not even the PSU fan is runs.
I've reset the bios, took it out of the case onto a piece of cardboard without the cpu heatsink/fans with the same result. No beeps.

MB - Gigabyte Z390 auros Pro
Pro - Intel I9 9900K
PSU - 850 watt Game Max RGB version
Vid - EVGA Gforce RTX 2060 XC
All new

Which is the more likely suspect MB or PSU? or other?

TIA
Swiftsail

 

[Ralston18]

Update your post to include full system hardware specs and OS.

Include PSU: make, model, wattage, age, condition.

"Light do flash on the MB when PSU is turned on."

Which lights?

Any beeps codes?

 

[swiftsail]

Update your post to include full system hardware specs and OS.

Include PSU: make, model, wattage, age, condition.

"Light do flash on the MB when PSU is turned on."

Which lights?

Any beeps codes?

Done

 

[Ralston18]

What motherboard lights flash?

Motherboard:

https://download.gigabyte.us/FileList/Manual/mb_manual_x570-aorus-pro-wifi_e.pdf

Verify that I identified the correct User Manual.

Physically numbered Page 24 lists the Status LEDs.

====

Do you have another, known working PSU to try?

Even an older, lower wattage PSU can be used to test the motherboard but should be done with as simple a configuration as possible.

Boot drive, integrated graphics (HDMI it appears), RAM. No overclocking.

Doublecheck all connections and seatings.

First to ensure that they are correct per the installation manual/ instructions and secondly, that they are fully and firmly connected.

 

[swiftsail]

What motherboard lights flash?

Motherboard:

https://download.gigabyte.us/FileList/Manual/mb_manual_x570-aorus-pro-wifi_e.pdf

Verify that I identified the correct User Manual.

Physically numbered Page 24 lists the Status LEDs.

====

Do you have another, known working PSU to try?

Even an older, lower wattage PSU can be used to test the motherboard but should be done with as simple a configuration as possible.

Boot drive, integrated graphics (HDMI it appears), RAM. No overclocking.

Doublecheck all connections and seatings.

First to ensure that they are correct per the installation manual/ instructions and secondly, that they are fully and firmly connected.

It's actually a Z390, but the leds you mentioned are the same. The entire board flashes when the power supply is switched on, then when the power button on the case is pushed you just get a flash from the cpu light. This system was up to the bios screen before something went sideways.

 

[swiftsail]

It's actually a Z390, but the leds you mentioned are the same. The entire board flashes when the power supply is switched on, then when the power button on the case is pushed you just get a flash from the cpu light. This system was up to the bios screen before something went sideways.

Acquired another PSU (Temporarily). Hooked it up with the same results. Order a new MB. We will see

 

[Ralston18]

If at all possible check the voltages on the PSU's before connecting the new motherboard.

https://www.lifewire.com/how-to-manually-test-a-power-supply-with-a-multimeter-2626158

First the old/original PSU and then the new PSU.

Reason being to at least get some assessment of each PSU. If both test okay for voltages then the motherboard is certainly more suspect.

Of if the original PSU is out of spec then that could have damaged the original motherboard.

In any case, the objective is to work back through everything possible to reduce risk to the new motherboard.

Double check the entire build. Read the motherboard's User Manual including all fine print. Read the installation instructions for all components. Details matter.

 

[swiftsail]

If at all possible check the voltages on the PSU's before connecting the new motherboard.

https://www.lifewire.com/how-to-manually-test-a-power-supply-with-a-multimeter-2626158

First the old/original PSU and then the new PSU.

Reason being to at least get some assessment of each PSU. If both test okay for voltages then the motherboard is certainly more suspect.

Of if the original PSU is out of spec then that could have damaged the original motherboard.

In any case, the objective is to work back through everything possible to reduce risk to the new motherboard.

Double check the entire build. Read the motherboard's User Manual including all fine print. Read the installation instructions for all components. Details matter.

PSU test good, new MB comes Friday