[SOLVED] Solid Yellow CPU LED and no POST on new build ?

[Gekomax]

Hello everyone,
after many years, I'm about to assemble a new PC, so I'm a bit out of practice...

Components:

• Intel® Core™ i9 14900KF
• Gigabyte Z790 Aorus Elite X v.1.0 (motherboard)
• Kingston FURY Beast 32 GB DDR5 6000 MHz CL40 (RAM)
• AsRock Arc A770 Phantom (GPU)
• Corsair HX1500i Fully Modular Ultra-Low Noise Platinum ATX 1500 Watt
• Artic Liquid Freezer III 360 (AIO)
• Be Quiet SILENT BASE 802 (case)
• Kingston SSD NV2 2TB

Plus a 3.5" HDD, two SSDs, and another M.2 drive.

The problem is this:

I've installed only the motherboard, CPU, and PSU, but the CPU LED on the motherboard is solid yellow. If I'm not mistaken, this means it doesn't recognize the CPU.

According to the Gigabyte website (here), the CPU support is as follows:

Honestly, I don't understand if it's supported or not. It seems that only the GPU is not supported. However, I've seen builds around with this motherboard and CPU combo. Additionally, even MSI’s competitor shows the same notation, and there are videos on YouTube showing the motherboard + CPU combo working.

I performed a Q-flash of the motherboard to the latest BIOS (with CPU and RAM installed only).

I opened a ticket with Gigabyte, but... no response.

I thought it might not be recognizing the CPU only in the graphics component, so I installed the GPU, but without any change.

The RAM seems to be supported (link]).

So, I thought it might be a faulty PSU. Using a CPU tester, I measured the values, and they are as follows:

Sometimes the PG is at 110.

Anyway, we are outside or at the edge of the specifications provided by Corsair on this page:

PG values are usually considered normal if they fall within the range of 100ms - 500ms, but can be lower than 100ms at times. 0ms PG values would be considered a failing PSU.

Could this be the issue?

Or is the CPU really faulty?

I appreciate any possible insights.

Thank you
Gekomax

 

[JohnBonhamsGhost]

performed a Q-flash of the motherboard to the latest BIOS

which exact BIOS version?
and have you re-loaded Optimize Defaults afterwards?

 

[FAhentai]

Hello everyone,
after many years, I'm about to assemble a new PC, so I'm a bit out of practice...

Components:

• Intel® Core™ i9 14900KF
• Gigabyte Z790 Aorus Elite X v.1.0 (motherboard)
• Kingston FURY Beast 32 GB DDR5 6000 MHz CL40 (RAM)
• AsRock Arc A770 Phantom (GPU)
• Corsair HX1500i Fully Modular Ultra-Low Noise Platinum ATX 1500 Watt
• Artic Liquid Freezer III 360 (AIO)
• Be Quiet SILENT BASE 802 (case)
• Kingston SSD NV2 2TB

Plus a 3.5" HDD, two SSDs, and another M.2 drive.

The problem is this:

I've installed only the motherboard, CPU, and PSU, but the CPU LED on the motherboard is solid yellow. If I'm not mistaken, this means it doesn't recognize the CPU.

According to the Gigabyte website (here), the CPU support is as follows:

Honestly, I don't understand if it's supported or not. It seems that only the GPU is not supported. However, I've seen builds around with this motherboard and CPU combo. Additionally, even MSI’s competitor shows the same notation, and there are videos on YouTube showing the motherboard + CPU combo working.

I performed a Q-flash of the motherboard to the latest BIOS (with CPU and RAM installed only).

I opened a ticket with Gigabyte, but... no response.

I thought it might not be recognizing the CPU only in the graphics component, so I installed the GPU, but without any change.

The RAM seems to be supported (link]).

So, I thought it might be a faulty PSU. Using a CPU tester, I measured the values, and they are as follows:

Sometimes the PG is at 110.

Anyway, we are outside or at the edge of the specifications provided by Corsair on this page:



Could this be the issue?

Or is the CPU really faulty?

I appreciate any possible insights.

Thank you
Gekomax

Hello everyone,
after many years, I'm about to assemble a new PC, so I'm a bit out of practice...

Components:

• Intel® Core™ i9 14900KF
• Gigabyte Z790 Aorus Elite X v.1.0 (motherboard)
• Kingston FURY Beast 32 GB DDR5 6000 MHz CL40 (RAM)
• AsRock Arc A770 Phantom (GPU)
• Corsair HX1500i Fully Modular Ultra-Low Noise Platinum ATX 1500 Watt
• Artic Liquid Freezer III 360 (AIO)
• Be Quiet SILENT BASE 802 (case)
• Kingston SSD NV2 2TB

Plus a 3.5" HDD, two SSDs, and another M.2 drive.

The problem is this:

I've installed only the motherboard, CPU, and PSU, but the CPU LED on the motherboard is solid yellow. If I'm not mistaken, this means it doesn't recognize the CPU.

According to the Gigabyte website (here), the CPU support is as follows:

Honestly, I don't understand if it's supported or not. It seems that only the GPU is not supported. However, I've seen builds around with this motherboard and CPU combo. Additionally, even MSI’s competitor shows the same notation, and there are videos on YouTube showing the motherboard + CPU combo working.

I performed a Q-flash of the motherboard to the latest BIOS (with CPU and RAM installed only).

I opened a ticket with Gigabyte, but... no response.

I thought it might not be recognizing the CPU only in the graphics component, so I installed the GPU, but without any change.

The RAM seems to be supported (link]).

So, I thought it might be a faulty PSU. Using a CPU tester, I measured the values, and they are as follows:

Sometimes the PG is at 110.

Anyway, we are outside or at the edge of the specifications provided by Corsair on this page:



Could this be the issue?

Or is the CPU really faulty?

I appreciate any possible insights.

Thank you
Gekomax

I don't really get it....
Is the CPU light still on after BIOS flashing?

 

[Gekomax]

which exact BIOS version?
and have you re-loaded Optimize Defaults afterwards?

the latest version: F12f on Gigabite support page

and I did a clear cmos on the motherboard since I can't access to bios.

I don't really get it....
Is the CPU light still on after BIOS flashing?

Yes, still solid yellow

 

[FAhentai]

the latest version: F12f on Gigabite support page

and I did a clear cmos on the motherboard since I can't access to bios.

Yes, still solid yellow

Flash bios again, check the CPU power connector.

 

[JohnBonhamsGhost]

still solid yellow

were all of these products purchased new,
not used/refurbished/renewed?

is the system fully powering on, just with the CPU_LED warning and not showing any display?

 

[Gekomax]

were all of these products purchased new,
not used/refurbished/renewed?

is the system fully powering on, just with the CPU_LED warning and not showing any display?

yes, everything is new, nothing used/refurbished/renewed

The system looks powering correctly: fans and pump are spinning and the GPU turns on.

The display is completely black.

I event plugged a buzzer but it's quiet. I've got just the CPU led warning.

 

[Gekomax]

Flash bios again, check the CPU power connector.

Nothing. I event tried to flash the F11 version but still got the warning and black screen



I checked again the power connectors, but they looks okay to me.

 

[JohnBonhamsGhost]

checked the power connectors, but they look okay

don't just look at them.
physically reseat them and make sure they are seated properly.

 

[falcon291]

Can it be the CPU wrong direction?

 

[FAhentai]

Nothing. I event tried to flash the F11 version but still got the warning and black screen



I checked again the power connectors, but they looks okay to me.

If I did not remeber that wrong, for those motherboards that supports no CPU BIOS updating, you should do it with motherboard and PSU only, which means that you should not install a cpu, nor a ram when you are flashing the bios. You just need to do it with PSU and motherboard. Otherwise once it is boot up it will straight away start POST process. Better you check the manu again to see if it works like this or not and try it again.
Once that is done and still does not work, remove the battery, plug it back. If still does not work, check the LGA socekt to see if there is any bent pin

 

[Gekomax]

don't just look at them.
physically reseat them and make sure they are seated properly.

I did it 20 times at least, I was tempted to start hammering them..

Can it be the CPU wrong direction?

I don't think it's possible, CPU can be mounted in just one direction.

If I did not remeber that wrong, for those motherboards that supports no CPU BIOS updating, you should do it with motherboard and PSU only, which means that you should not install a cpu, nor a ram when you are flashing the bios. You just need to do it with PSU and motherboard. Otherwise once it is boot up it will straight away start POST process. Better you check the manu again to see if it works like this or not and try it again.
Once that is done and still does not work, remove the battery, plug it back. If still does not work, check the LGA socekt to see if there is any bent pin

I will give a try. The manual don't say nothing about CPU installation. But says something I didn't do about connecting just one 12V power connector during Q-Flash plus operation:

Connect the power cables to the 12V power connector (connect either one if there are two) and main power connector.

never did it, i will give another try.

I've carefully searched for bent pin but there aren't

 

[drjohnnyfever]

If I did not remeber that wrong, for those motherboards that supports no CPU BIOS updating, you should do it with motherboard and PSU only, which means that you should not install a cpu, nor a ram when you are flashing the bios. You just need to do it with PSU and motherboard. Otherwise once it is boot up it will straight away start POST process. Better you check the manu again to see if it works like this or not and try it again.
Once that is done and still does not work, remove the battery, plug it back. If still does not work, check the LGA socekt to see if there is any bent pin

THIS is excellent advice.

I would definitely try to use the Flash Bios feature if you have it without the CPU being in. I did this when I build my sons gamer about 8 months ago. I was a little worried, initially, but I watched a couple YouTube videos on how to do it with the MSi board I used. After flashing it to the newest bios, I put the i5-14600K in and booted right up. No issues. Definitely watch the videos on how to do it for your board. My board was 14th gen compatible, but only after I did the update using the Flash feature and it specifically stated to do it without the CPU installed.

edit - I just checked - the MOBO I did this on is an MSi Pro Z790-A WiFi board...

 

[Gekomax]

THIS is excellent advice.

I would definitely try to use the Flash Bios feature if you have it without the CPU being in. I did this when I build my sons gamer about 8 months ago. I was a little worried, initially, but I watched a couple YouTube videos on how to do it with the MSi board I used. After flashing it to the newest bios, I put the i5-14600K in and booted right up. No issues. Definitely watch the videos on how to do it for your board. My board was 14th gen compatible, but only after I did the update using the Flash feature and it specifically stated to do it without the CPU installed.

edit - I just checked - the MOBO I did this on is an MSi Pro Z790-A WiFi board...

just tried to flash with no ram and CPU but still no luck

 

[FAhentai]

just tried to flash with no ram and CPU but still no luck

Then go back to the manual. make sure that that light is for CPU rather than RAM.
I mean, the chance for you to have a faulty CPU and CPU socket is low. However, for DDR5, the chance for you to have problem with RAM is high.
If that is RAM problem, just try to install one ram first to see if it boots up or not

 

[Gekomax]

Then go back to the manual. make sure that that light is for CPU rather than RAM.
I mean, the chance for you to have a faulty CPU and CPU socket is low. However, for DDR5, the chance for you to have problem with RAM is high.
If that is RAM problem, just try to install one ram first to see if it boots up or not

unfortunatelly I already read the manual that say pratically nothing usefull just:

If the CPU/DRAM/VGA LED is on, that means the corresponding device is not working normally; if the BOOT LED is on, that means you haven't entered the operating system yet.

and that is the CPU led, it's written on the board.

I tried to place the (unique) 32gb ram module I bought in all slots but nothing changes.

Besides, the module looks to be compatible according to the Gigabyte support web page:

It's "a bit" frustating, I spent a lot of money for some useless garbage

 

[drjohnnyfever]

Did the Flash Bios go thru it's process without the CPU and RAM in? Was the cpu light lit/ blinking while flashing the bios with no cpu? Sometimes it takes longer than you might think to flash the bios. This is the video I watched before flashing my msi board... It's important that you do it the way gigabyte says, so look for that video from gigabyte.

View: https://www.youtube.com/watch?v=adrBU9dqcyo&t=10s

 

[Gekomax]

Did the Flash Bios go thru it's process without the CPU and RAM in? Was the cpu light lit/ blinking while flashing the bios with no cpu? Sometimes it takes longer than you might think to flash the bios. This is the video I watched before flashing my msi board... It's important that you do it the way gigabyte says, so look for that video from gigabyte.

View: https://www.youtube.com/watch?v=adrBU9dqcyo&t=10s

I followed step by step the manual but still the CPU solid yellow led remains and the motherboard doesn't even post/boot. Back screen's still here.

There is a video of the process here:

So maybe it's if a CPU or a PSU problem as I mentioned in my first post.

 

[neojack]

if it was me, i would purchase the least expensive CPU compatible with this motherboard on amazon. Then i would try it.

If it works, return your current CPU.
if it does not work, return your motherboard.

then you can keep the cheap CPU as a backup (since 14th gen intel is prone to failures, it's a good thing to have), or you can return it to amazon within 30 days.

 

[Gekomax]

if it was me, i would purchase the least expensive CPU compatible with this motherboard on amazon. Then i would try it.

If it works, return your current CPU.
if it does not work, return your motherboard.

then you can keep the cheap CPU as a backup (since 14th gen intel is prone to failures, it's a good thing to have), or you can return it to amazon within 30 days.

Thank you, this Is a good advice.

Will keep you posted

 

[drjohnnyfever]

If the MOBO isn't updating the bios in the manner it says it should without installing the CPU or RAM, my guess is that the MOBO is bad; or it was bricked with an incomplete bios update.

Anyway, good luck. Let us know how it turns out.

 

[Gekomax]

Hello everyone. Here’s the conclusion of the story:

I sent the CPU to the seller for a check. In the meantime, I bought a cheap Intel i3 CPU for about 80 euros. With the cheap CPU, the system worked, and I was able to work without issues. After a few weeks, the seller wrote to me saying that the CPU doesn’t work (it has a short circuit) and was sent to Intel for replacement. Just last Friday, I went to pick up the CPU, and now the PC works (I didn’t even have to reinstall the operating system).

Now I only have a small issue (it won’t turn on after shutting down), but I will start another thread for that.

Thanks, everyone, for the support, see you soon!
Gekomax