Red light on mobo labelled CPU and no post.

enophonyx · June 12

i am building my first AM5 pc and am getting no post.
specs are:
b850m gaming x wifi6e
9800x3d
5070
64gb 6000mt/s cl30
lian li sp850 sfx psu

i have cleared cmos reseated all components and cable ran with 1 stick of ram and flashed bios and im still getting no post

any help would be amazing

Poinkachu · June 12

25 minutes ago, enophonyx said:

i am building my first AM5 pc and am getting no post.
specs are:
b850m gaming x wifi6e
9800x3d
5070
64gb 6000mt/s cl30
lian li sp850 sfx psu

i have cleared cmos reseated all components and cable ran with 1 stick of ram and flashed bios and im still getting no post

any help would be amazing

How long you waited ? first time post may take quite long on AM5.

Is the RAM dual stick? or quad stick ?

enophonyx · June 12

23 minutes ago, Poinkachu said:

How long you waited ? first time post may take quite long on AM5.

Is the RAM dual stick? or quad stick ?

its dual stick, 2x32gb corsair vengeance. ive waited upwards of 5 minutes for the post

Poinkachu · June 12

3 minutes ago, enophonyx said:

its dual stick, 2x32gb corsair vengeance. ive waited upwards of 5 minutes for the post

Any kind of sign on the motherboard ? like debug led, etc.

Tried plugging display cable to motherboard instead of GPU ?

enophonyx · June 12

16 minutes ago, Poinkachu said:

Any kind of sign on the motherboard ? like debug led, etc.

Tried plugging display cable to motherboard instead of GPU ?

GPU currently isnt plugged in to focus more on the mobo, got a display port connected to the mobo. only LED is a CPU LED

Poinkachu · June 13

12 hours ago, enophonyx said:

GPU currently isnt plugged in to focus more on the mobo, got a display port connected to the mobo. only LED is a CPU LED

Your motherboard manual seem to insinuate that that is a sign of a problem related to CPU.

I'd check the pins on the motherboard at least.

enophonyx · June 14

On 6/13/2025 at 11:34 AM, Poinkachu said:

Your motherboard manual seem to insinuate that that is a sign of a problem related to CPU.

I'd check the pins on the motherboard at least.

forgot to follow up here, after testing everything i could think of, i took it to a local shop for a diagnosis and the mobo was broken so i have sent it back for a replacement. thank you for your help!