[SOLVED] New PC no post, red CPU light

Feb 4, 2021
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Specs:
MSI X570 Gaming Edge Wifi
AMD Ryzen 7 5800x
MSI MAG Coreliquid 240R
ASUS GTX 1080ti
CORSAIR Vengance Pro RGB 2x8gb @3600MHz
SABRENT1TB M.2 SSD
SEAGATE Barracuda 1TB HDD
CORSAIR RM850 PSU

All new parts recently bought together. Computers been built but it doesn't post. All rgb lights up, fans spin including radiator fans and the pumps RGB light. However, theres a red light on the ezdebug lights by the CPU.

I've taken off the cooler to check if the CPU is seated correctly and it is. I've also tried running with single RAM in different slots and different configurations with both. Only thing that alarms me is the extra 4pin power for the CPU on the motherboard, it lights up the system when it is connected to the 8 pin but when the 4pin is connected too nothing happens at all. Also tried to see if it would boot with no GPU. The debug speaker doesn't beep either.

Keep in mind I'm not an experienced builder so any tips would be greatly appreciated. Thank you
 

Nemesia

Distinguished
Hi Kurorin39.

That board need BIOS version 7C37v1C or the latest BIOS version 7C37v1D to support that Ryzen 7 5800X.

You're lucky your board has a BIOS flashback function so you can flash the BIOS without a CPU installed.

Follow the steps below.
  • Download the latest BIOS version from the board website - https://www.msi.com/Motherboard/support/MPG-X570-GAMING-EDGE-WIFI#down-bios
  • Extract the files from the BIOS zip file
  • Rename the BIOS file to MSI.ROM
  • Put the MSI.ROM file on a FAT32 formatted USB Key
  • BIOS flashback can have bad issues when stuff is installed on the board. Remove the CPU, RAM, GPU and the SSD. The board needs to be barebone with only the CPU power cable connected and the 24pins.
  • Put the USB key in the appropriate usb slot for BIOS flashback. It should be easy to spot at the rear. It normally has a usb port with BIOS written over it or something. Look in your manual.
  • Press the Bios Flashback button for 3 seconds until a light start flashing on the board and the usb key if it has a light on it.
  • Wait until the light stop flashing. Can take up to 10 minutes.
  • After it's done just reinstall everything.
"is the extra 4pin power for the CPU on the motherboard"

You don't need the extra 4 pin CPU power connector. The 8 pin is enough and the 4 pin is for extreme overclocking only.

"Also tried to see if it would boot with no GPU"

The Ryzen CPU's does not have integrated graphics unless they have a "G" in their name. Like the 3400G. A Ryzen 5800X does not so plugging the monitor on the board won't work.

The RAM should be in slots A2-B2 after you put the stuff back in after the BIOS update.
 
Last edited:

Nemesia

Distinguished
Hi Kurorin39.

That board need BIOS version 7C37v1C or the latest BIOS version 7C37v1D to support that Ryzen 7 5800X.

You're lucky your board has a BIOS flashback function so you can flash the BIOS without a CPU installed.

Follow the steps below.
  • Download the latest BIOS version from the board website - https://www.msi.com/Motherboard/support/MPG-X570-GAMING-EDGE-WIFI#down-bios
  • Extract the files from the BIOS zip file
  • Rename the BIOS file to MSI.ROM
  • Put the MSI.ROM file on a FAT32 formatted USB Key
  • BIOS flashback can have bad issues when stuff is installed on the board. Remove the CPU, RAM, GPU and the SSD. The board needs to be barebone with only the CPU power cable connected and the 24pins.
  • Put the USB key in the appropriate usb slot for BIOS flashback. It should be easy to spot at the rear. It normally has a usb port with BIOS written over it or something. Look in your manual.
  • Press the Bios Flashback button for 3 seconds until a light start flashing on the board and the usb key if it has a light on it.
  • Wait until the light stop flashing. Can take up to 10 minutes.
  • After it's done just reinstall everything.
"is the extra 4pin power for the CPU on the motherboard"

You don't need the extra 4 pin CPU power connector. The 8 pin is enough and the 4 pin is for extreme overclocking only.

"Also tried to see if it would boot with no GPU"

The Ryzen CPU's does not have integrated graphics unless they have a "G" in their name. Like the 3400G. A Ryzen 5800X does not so plugging the monitor on the board won't work.

The RAM should be in slots A2-B2 after you put the stuff back in after the BIOS update.
 
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