PC wont boot, no post

[Fizer]

I built my PC last summer. Aorus B650 Elite AX rev. 1.2, Ryzen 7800X3D, 2x T-Force Vulcan 16GB DDR5, RTX 5060 Ti. I never had any problems with my PC.

This Monday, I played BF6 without any issues, then I shut down my PC and went to bed. The next day, when I turned on my PC, it wouldn’t boot at all. The fans spin, but the LEDs on the fans do not light up. My first reflex was to check the diagnostic LEDs on the motherboard. When I turn on the PC, the CPU LED lights up for 1 second, then switches to DRAM and stays lit. I get no POST and nothing is displayed on the screen.

I then tried removing the RAM sticks and turning on the PC; the same thing happens. I then tried updating the BIOS using Q-Flash and a USB drive. I downloaded the latest update for my motherboard (FC2), renamed the file from “B650AORUSELITEAX12.FC2” to “GIGABYTE.BIN,” and copied the file onto a USB 2.0 drive formatted in FAT32. I inserted the USB drive into the correct port and pressed the Q-Flash button. After 10 minutes of waiting, the PC shut itself off.

I turned the PC back on, but nothing changed. I then disassembled my PC to rebuild it (I needed to do some cable management anyway). Once everything was disassembled, the motherboard had nothing connected—no CPU, M.2, SSD, or GPU. I tried doing the BIOS update again because apparently Q-Flash Plus is supposed to be able to update the motherboard without a CPU, RAM, etc.

After that, I reassembled my PC and connected everything. Now I get a different boot behavior: as soon as I turn on the PSU using its switch, the RGB LEDs on the motherboard light up immediately. I left it in that state for 10 minutes in case it would turn on by itself to perform some operations. Then I powered on the PC. The fans spin, still without their LEDs lighting up, but now the diagnostic LED is stuck on CPU.

 

Now when I turn on my PC, the LED on the motherboard stays on CPU. When I remove my RAM sticks and power on the PC, the CPU LED stays lit, but the speaker I connected to the motherboard beeps 4 times -.-.-.- and the DRAM LED doesn’t even light up. The Q-Flash button doesn’t work anymore either. The RGB LED of the motherboard lit up as soon there is power, even when the PC is shutdown.

 

Could someone help me? I don’t know what to do anymore, and it really bothers me to spend another $1000 when this PC isn’t even a year old. Usually my builds last me 5–6 years.

[xAcid9]

Did you try reset the BIOS before updating it?

I don't know why you're so quick to update the BIOS when you didn't change any other components that was working normally before.

 

27 minutes ago, Fizer said:

I don’t know what to do anymore, and it really bothers me to spend another $1000

RMA the mainboard/CPU?

[SpaceGhostC2C]

46 minutes ago, Fizer said:

My first reflex was to check the diagnostic LEDs on the motherboard. When I turn on the PC, the CPU LED lights up for 1 second, then switches to DRAM and stays lit. I get no POST and nothing is displayed on the screen.

That's telling you a RAM issue. It should happen with no RAM too, so try 1 stick in 1 slot at a time. It could also be due to RAM settings, but the MB should have some fallback for that.

Since you (maybe successfully) flashed your BIOS, check in your manual what the "Multi-key" in your board does by default, maybe one more thing to try.

 

46 minutes ago, Fizer said:

Then I powered on the PC. The fans spin, still without their LEDs lighting up, but now the diagnostic LED is stuck on CPU.

Did you properly reseat the CPU and its cooler after disassembly?

 

Do you have a spare CR2032 around? Just to quickly rule out one more thing.

 

46 minutes ago, Fizer said:

The RGB LED of the motherboard lit up as soon there is power, even when the PC is shutdown.

I don't know if yours did it before, but that's very common behavior. You may have set it differently when you built it, but after flashing it it should be back to stock behavior, and most board had one led (now the entire RGB array) turn on by default when plugged in (even one of my dead boards, which would do nothing at all when pushing the button, would have some lights on when plugged).

 

 

[Fizer]

1 hour ago, xAcid9 said:

Did you try reset the BIOS before updating it?

I don't know why you're so quick to update the BIOS when you didn't change any other components that was working normally before.

 

RMA the mainboard/CPU?

I did try to reset by removing the battery and wait 10min and short the cmos reset. I try to update bios because it was the only thing that I tough broke my pc. Last time it was functioning and close it, it didn't move and I didn't not have a power outage even if my pc is plugged in into a Power Filtering

[Fizer]

56 minutes ago, SpaceGhostC2C said:

That's telling you a RAM issue. It should happen with no RAM too, so try 1 stick in 1 slot at a time. It could also be due to RAM settings, but the MB should have some fallback for that.

Since you (maybe successfully) flashed your BIOS, check in your manual what the "Multi-key" in your board does by default, maybe one more thing to try.

 

I did try that. When I built my PC, I first but my two stick of RAM to A1 and B1, in the manual of the motherboard it says to put it to A2 and B2 for only two stick, i dont know if it could made the probleme. But I did try one stick in each RAM socket with both my stick, with no success

 

59 minutes ago, SpaceGhostC2C said:

Did you properly reseat the CPU and its cooler after disassembly?

 

Do you have a spare CR2032 around? Just to quickly rule out one more thing.

 

I did try reseating the CPU with no success but the first time i try reseating it, the DRAM LED did not turn on after.

And I will try an other CR2032 just in case but I tough it was only when PC dont have power, and when the PC have power the CR2032 become useless.

1 hour ago, SpaceGhostC2C said:

I don't know if yours did it before, but that's very common behavior. You may have set it differently when you built it, but after flashing it it should be back to stock behavior, and most board had one led (now the entire RGB array) turn on by default when plugged in (even one of my dead boards, which would do nothing at all when pushing the button, would have some lights on when plugged).

To be honest i dont know if the Motherboard RGB was lit before. I dont really like RGB. But I know there is two array of RGB on the MotherBoard (if I am not mistaken) one on the bottom right and one near the I/O port but only the one on the bottom right light up.

 

I dont know what is the "MultiKey" but i will read up the manual, it could help.

[SpaceGhostC2C]

11 hours ago, Fizer said:

And I will try an other CR2032 just in case but I tough it was only when PC dont have power, and when the PC have power the CR2032 become useless.

It depends. Some models won't post without it, while others may not show any symptoms until unplugged.

 

11 hours ago, Fizer said:

I dont know what is the "MultiKey" but i will read up the manual, it could help.

Me neither, just something I saw your motherboard has and seems can be configured to do different things. Some Asus boards have "mem OK" buttons to try unstuck motherboards from problematic RAM settings, wondered if Gigabyte had something similar.

 

I hope you fix it!