[SOLVED] My computer doesn't POST after changing CPU

[daveman426]

Hi, I got a new pc today and it has

Aorus Elite 450B motherboard

Ryzen 7 3800x cpu

Gtx 2060 super

2x8 3000mhz cl15 Corsair ram

And my issue is that I put all the parts, besides the 3800x, where I had a Ryzen 5 2600 and did the chipset and bios update so my motherboard could run the CPU. It worked at first and everything booted up, but then when I put in the 3800x the PC wouldn't even have any lights, I put the 2600 back in, but it's still the same! Is my motherboard dead, because the PSU is fine, please someone help!

 

[daveman426]

Have you done the bios update for the 3800x

Yes, that's why I put the 2600 first to do the update, I updated the chipset and then the bios to version f51, so it should be working, but the PC shows absolutely no signs of life

 

[XxDarkMario20xX]

Yes, that's why I put the 2600 first to do the update, I updated the chipset and then the bios to version f51, so it should be working, but the PC shows absolutely no signs of life

All the cables plugged in correctly no loose wireing?

Whats the full name of your motherboard?

Aorus Elite 450B motherboard But there many Aorus out there!

 

[daveman426]

All the cables plugged in correctly no loose wireing?

Yes, also an update, I used the old power supply and the ram lit up, so I'm thinking if it will lit up with the 3800x should I try?

 

[XxDarkMario20xX]

Yes, also an update, I used the old power supply and the ram lit up, so I'm thinking if it will lit up with the 3800x should I try?

Leave it for now until you get more answers but Is your MB

B450 AORUS ELITE

 

[daveman426]

Is your MB

B450 AORUS ELITE

Yes it is

 

[drea.drechsler]

...
I put the 2600 back in, but it's still the same!
...

Still the same how?

Did you reset CMOS? I'd suggest doing a battery pull reset.

 

[daveman426]

Still the same how?

Did you reset CMOS? I'd suggest doing a battery pull reset.

The cmos reset didn't do anything, also I used the old power supply and the ram started glowing with the 2600 inserted

 

[XxDarkMario20xX]

Yes it is

I would try updating your BIOS to F40 and see if that will work maybe you missed something with the updates
https://www.gigabyte.com/uk/Motherboard/B450-AORUS-ELITE-rev-10/support#support-dl-bios

Update AGESA 1.0.0.2 for next Gen. AMD Ryzen™ CPUs full support
Note:

1. If you are using Q-Flash Utility to update BIOS, make sure you have updated BIOS to F32 before F40
2. Before update BIOS to F40, you have to install EC FW Update Tool (B19.0517.1 or later version) to avoid 4DIMM DDR incompatibility on 3rd Gen AMD Ryzen™ CPU.

 

[gingerrankin]

Your mobo has a group of 4 LEDs that indicate the possible CPU, RAM, VGA or BOOT failure:

21) CPU/DRAM/VGA/BOOT (Status LEDs)
The status LEDs show whether the CPU, memory, graphics card, and operating system are working properly after system power-on. 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.
CPU: CPU status LED
DRAM: Memory status LED
VGA: Graphics card status LED
BOOT: Operating system status LED

Is there any led on?

 

[daveman426]

I would try updating your BIOS to F40 and see if that will work

I can't update right now, since my PC doesn't boot at all

 

[XxDarkMario20xX]

I can't update right now, since my PC doesn't boot at all

Whats your PSU also if its all brand new could you go back and swap the parts for new ones because I thought bios update will fix it.

 

[daveman426]

Your mobo has a group of 4 LEDs that indicate the possible CPU, RAM, VGA or BOOT failure:

21) CPU/DRAM/VGA/BOOT (Status LEDs)
The status LEDs show whether the CPU, memory, graphics card, and operating system are working properly after system power-on. 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.
CPU: CPU status LED
DRAM: Memory status LED
VGA: Graphics card status LED
BOOT: Operating system status LED

Is there any led on?

Well I just tried both psus and when I put in ram they make the ram glow, but I did them outside of the case, so it's not the PSU. I'll try to assemble the PC again and tell you the results, I'll place the 2600 in the socket for now

 

[daveman426]

Your mobo has a group of 4 LEDs that indicate the possible CPU, RAM, VGA or BOOT failure:

21) CPU/DRAM/VGA/BOOT (Status LEDs)
The status LEDs show whether the CPU, memory, graphics card, and operating system are working properly after system power-on. 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.
CPU: CPU status LED
DRAM: Memory status LED
VGA: Graphics card status LED
BOOT: Operating system status LED

Is there any led on?

Do I need to boot it on? I can try to see if it will post

 

[daveman426]

Ok! It posted with the 3800x insterted, I'll assemble the whole PC inside the case and tell you if it's working

 

[daveman426]

UGH! When I put it all inside the case it's the same, it doesn't have any lights or nothing! By the process of elimination it has to be the cooler, something with the case, or the cables are messed up. Because when I earlier post'd it was out of the case, had minimal wiring and no cooler. Does anyone have any idea what's wrong?

 

[daveman426]

Whats your PSU also if its all brand new could you go back and swap the parts for new ones because I thought bios update will fix it.

I've been trying for so long, but it still doesn't want to boot while it's inside the case

 

[ttower2020]

Having no cooler would make it less likely to boot, since it might check for cooler fans. Keep the cooler installed. Try unplugging EVERYTHING you do not need. Unplug any extra drives, USB devices, etc. Just plug in the CPU, GPU, and Motherboard power + SATA is you have a sata boot drive. If you have any secondary drives, disconnect them. Put the RAM in the slots 2 and 4, counting left to right. The one closest to the CPU should be empty. Make sure all the PSU plugs are installed all the way, sometimes it feels in, but still needs to go farther. I do not know if this will help, but its all basic troubleshooting steps.