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Problem with built PC

SergioGarG
Star I

Hi everyone,

Noob here, so beware. After some years, I finally decided to build a PC from some new parts and some inherited from my brother (see the list below).

I assembled everything, but after I powered up the computer, I realized the motherboard lighted a few LEDs orange. What is worse, after turning on the PC, it shuts down after a few seconds (https://www.youtube.com/watch?v=GUZP-Gfs_U0).

I then went down the rabbit hole and started removing components from the configuration to isolate the issue. At some point, I had only the PSU, motherboard, and CPU connected but the problem remained.

I also read that the problem could be the case so I removed the motherboard from it and placed it on top of a surface that wouldn't cause static electricity (https://imgur.com/tzwUDdC). That didn't solve it.

I then started trying to replace components. I requested a new motherboard expecting it to be the main problem. That wasn't it. Thinking that the problem could be the PSU - the power supply might not be enough, I suspected - I bought a new one. But no, it wasn't the problem either. At this point, I'm a bit desperate so I'm begging for help.

I then started trying to replace components. I requested a new motherboard expecting it to be the main problem. That wasn't it. Thinking that the problem could be the PSU - the power supply might not be enough, I suspected - I bought a new one. But no, it wasn't the problem either.

Another potentially interesting thing to highlight is that everything shuts down if I leave the power button jumper on the "10-1 pin Sustem Panel header". If I use the jumper and immediately remove it when the system boots the fans keep spinning - although the orange LED remains and the video outputs don't work.

I have also checked that the motherboard is compatible with the CPU, and it is supposed to be.

At this point I'm a bit desperate so I'm begging for help. Thanks in advance!

--List of components:

- Motherboard: Prime asus b450m-a II [new]
- SSD: crucial P3 PCIe NVMe M.2 SSD [new]
- RAM: x2 DDR4 vengeance LPX sticks [inherited]
- CPU: AMD Ryzen 5 2600 [inherited]- GPU: sapphire radeon rx580 [inherited]
- PSU: Enermax naxn (500 W) [inherited] -> Seasonic G12 GC-850 (850 W) [new]

PS: I've other posts (e.g., https://www.reddit.com/r/buildapc/comments/ahp51r/comment/eegonu3/) but didn't solve my problem.

1 REPLY 1

Jiaszzz_ASUS
Moderator
Moderator

Hello, @SergioGarG 

Due to the ongoing local holidays in our area, my response time may experience delays.
I apologize for any inconvenience the delayed replies may have caused.

May I ask if the situation you described happened after any changes were made? For example, adjusting the BIOS settings or connecting an external device
Based on the situation you described, we suggest checking if there are any bent pins on the CPU or trying cross-testing with a different CPU.
Also, please consider updating the BIOS to the latest version 4402, released on January 8, 2024, via BIOS FlashBack, and clear CMOS before rechecking the issue.
If the issue persists, please consider reaching out to the original place of purchase or the ASUS official service center to arrange for further diagnostics and repairs.

Thank you.