Completed my first PC build and saw a white flashing CPU.
Completed my first PC build and saw a white flashing CPU.
Your current setup looks like it's been through some changes. You've removed the GPU and RAM, reinserted them, and after powering up, you're seeing a white light on the CPU. The HDMI is still in the GPU slot. It seems the screen hasn't turned on yet. Have you checked the CPU connections and BIOS settings? Also, since your B550 motherboard came with a Ryzen 5 desktop build, it's possible the flash BIOS is required for full functionality. The DEBUG light might be stuck due to power or firmware issues. Try resetting the BIOS and ensure all cables are securely connected.
The tutorial demonstrates how to update the BIOS using a video that applies to various motherboard models from the same manufacturer. The instructions remain consistent.
Update the BIOS to match your processor capabilities, as mentioned by Poinkachu. Since your CPU lacks built-in graphics, you’ll also need to connect the GPU to enable the system to start and install Windows properly.
In your initial image there doesn’t appear to be a power cable connected to the GPU 8 pin. Is this a draft or a completed setup? I’d fix it first. If after properly powering the GPU it still won’t boot, the problem likely lies with the BIOS. Check the motherboard box for a BIOS revision—you probably need an update. Your 5600 is compatible with 7C95v2A and higher. https://uk.msi.com/Motherboard/B550M-PRO...FI/support If you plan to use the flash button feature (without CPU, RAM, or GPU attached), you’ll need a fat32 USB stick and rename the BIOS file to MSI.ROM. Insert the USB into the dedicated port, press the flashback button and wait until the system restarts.
I realized there might be an oversight, I still have unused CPU, VGA, SATA, and PERIF cables from the power supply. For connecting to the GPU 8 pin, you’ll need the appropriate cable. Regarding the RGB lights, they’re having issues too—tried changing the LED _SW1 but it didn’t fix the problem.
Ensure there are clearly labeled 6+2 pins or similar cables with PCI-E or VGA markings.
It seems like the suggestion might not be directly related. The issue with the cable management could have been improved.
I followed the instructions properly and performed a quick CMOS reset, then completed the BIOS update. However, the CPU indicator remains stuck on white. I’ve checked all troubleshooting steps and don’t think I’ve missed anything. Could you look into other potential causes?
Are all items you purchased brand new? You notice Amazon appears in your PC parts list. When assembling my current PC, I faced issues with warehouse deals products that arrived damaged and weren’t properly tested. I received both a faulty CPU and a broken motherboard. A possible cause for the CPU light could be related to the BIOS flash process. In my experience, strict formatting (fat32) and naming conventions (MSI.ROM) played a role. Some users reported similar problems with stick size or interface (8GB or less or USB2). Did you see a blinking indicator near the dedicated USB port during the BIOS flash? There’s limited information on MSDI’s website, but this video was very helpful for me.