[SOLVED] Z390 aorus pro cpu and dram led

[Blunttakelflight]

Hello,
I bought a new cpu motherboard and psu.
New components are i9-9900k - z390 aorus pro - and a cooler master 850 watt 80+ gold psu.

full pc specs:
Coolermaster 850 watt psu
9900k
2080 ti
Z390 aorus pro
Hyperx 3200 32g

Now I installed everything tried turning the pc on and all that happend was the rgb on the motherboard itself kept going on and off even when I didn’t press the power button. After checking all cables etc putting cpu in again same issue. Okay fine I bought the same motherboard again! Now everything plugged go to turn in on everything powers on motherboard rgb cpu fan case rgb gpu everything on. No display output. And the cpu and dram led keep blinking red first cpu then dram they keep switching until pc turns off and then reboots on by itself then same story with the leds. So what I have tried I tried to use another psu known working also other psu cables. Powering with 1, 2 and 4 sticks installed, clearing cmos, had a i5 6400 laying around which turned out compatible with the board also didn’t work. I’m out off ideas here? Please help.. what do you all think is my cpu dead or maybe do I need other ram even though the ram works fine on another build off mine?

 

[jojesa]

Assuming, the motherboard was installed properly, front IO cables installed correctly and there is not damage to the CPU or RAM sockets.

Power off the PC.
Power off PSU.
Unplug the power cable.
Press the power button for 10-15 seconds.
Remove the CMOS battery.
Leave two sticks of RAM on sockets B2 & A2 (2nd and 4th from CPU).
Install CMOS battery.
Plug power cable.
Power on PSU
Power on PC.

The PC might cycle (power on and off) several times.
It could take 3-5 minutes for the motherboard BIOS to configure components.

 

[Blunttakelflight]

Assuming, the motherboard was installed properly, front IO cables installed correctly and there is not damage to the CPU or RAM sockets.

Power off the PC.
Power off PSU.
Unplug the power cable.
Press the power button for 10-15 seconds.
Remove the CMOS battery.
Leave two sticks of RAM on sockets B2 & A2 (2nd and 4th from CPU).
Install CMOS battery.
Plug power cable.
Power on PSU
Power on PC.

The PC might cycle (power on and off) several times.
It could take 3-5 minutes for the motherboard BIOS to configure components.

no damage to cpu or ram sockets. Did exactly what you seen been about 10 minutes now... still just in a loop of turning on and off, the cpu led flashing short and then dram longer and that repeats itself

 

[jojesa]

no damage to cpu

Just wanted to make sure, since a Core i5 6400 is not compatible with the CPU socket on that motherboard and should not be installed.

Try with one RAM module on each of the 4 sockets.

Maybe the motherboard you got does not have a BIOS compatible with the Core i9-9900k

 

[Blunttakelflight]

Just wanted to make sure, since a Core i5 6400 is not compatible with the CPU socket on that motherboard and should not be installed.

Try with one RAM module on each of the 4 sockets.

Maybe the motherboard you got does not have a BIOS compatible with the Core i9-9900k

You are right I must have misread! And I have tried that same result... just the leds.

 

[Blunttakelflight]

You are right I must have misread! And I have tried that same result... just the leds.

And to add to that the board clearly states it supports 9th gen out off the box so how do they expect me to get the pc to post if that’s not true?

 

[jojesa]

And to add to that the board clearly states it supports 9th gen out off the box so how do they expect me to get the pc to post if that’s not true?

There are several 9th gen CPUs available. Core i7-9700K, Core i5-9600K, etc.. and those CPUs were supported when the motherboard was released.
So, technically, they weren't lying.

If you see the Supported CPU list, the motherboard supports the i9-9900k (RO) after BIOS F9, but it does support the i9-9900k (PO) after BIOS F5.

Could you check the CPU retail box and check the stepping is available.

 

[Blunttakelflight]

There are several 9th gen CPUs available. Core i7-9700K, Core i5-9600K, etc.. and those CPUs were supported when the motherboard was released.
So, technically, they weren't lying.

If you see the Supported CPU list, the motherboard supports the i9-9900k (RO) after BIOS F9, but it does support the i9-9900k (PO) after BIOS F5.

Could you check the CPU retail box and check the stepping is available.

first off all thanks for your help already! I don’t have the original box off the cpu no more.. I looked on internet I couldn’t find any other way to tell if you have a ro or po. So since my pc doesn’t work let’s assume it is the ro. How will I go about it? Buy a very low end cpu and update the motherboard or is there other ways? Like a celeron g4920 ?

 

[Blunttakelflight]

Well the problem seems to be fixed, I went to sleep woke up decided to try one more time! Unplug everything! And plug it back in and boot straight away been stresttesting the system for over an hour now all seems stable! Since I unplugged everything and plugged back in I’m not 100% on what the issue was but I am 90% sure that I might have flipped my cpu power cable... it seems so fit both ways but it clearly states what side goes into psu and what side in motherboard! Although I’m not 100% sure I think that that was the issue! And Jojesa thankyou for your help!

 

[jojesa]

Well the problem seems to be fixed, I went to sleep woke up decided to try one more time! Unplug everything! And plug it back in and boot straight away been stresttesting the system for over an hour now all seems stable! Since I unplugged everything and plugged back in I’m not 100% on what the issue was but

I am glad you got it to work.

I am 90% sure that I might have flipped my cpu power cable... it seems so fit both ways but it clearly states what side goes into psu and what side in motherboard! Although I’m not 100% sure I think that that was the issue!

Yikes!!!, a CPU ATX power cable should not fit in more than one way, unless is forced into the power connector.
If you did not forced the cable into the connector, I wouldn't trust a PSU that provides such connector, since you could have damaged your motherboard and CPU.