All of the lights and fans turn on in my system when the CPU is not plugged in. Once I add the CPU and fan it no longer responds to power up.
Initially I did a full system build in the case. Everything is brand new out of the box except for the GPU, which was working fine in a different system just a few days ago.
To narrow things down I changed to a breadboard build with only the motherboard, one stick of memory, the PSU, and a motherboard speaker for debugging. With this minimal build I get the same results. The board turns on fine without the CPU, but when I put the CPU and fan into the motherboard, it does not respond to power up at all anymore. There are no sounds from the speaker and no lights of any kind turn on.
The odd thing is that when the CPU is installed I can push the "Flash BIOS Button" and the red light there will blink, so there is power of some sort getting to the board still, it's just that nothing else works or responds in any way. Is there any further debugging I can do to figure out what's wrong? Is it likely just a defective CPU that I need to return to AMD?
Thank you kindly in advance for any help,
-k
Initially I did a full system build in the case. Everything is brand new out of the box except for the GPU, which was working fine in a different system just a few days ago.
- Phanteks Eclipse P360A
- MSI B550 Gaming Edge Wifi flashed to the latest BIOS version 7C91v15
- AMD Ryzen 5600x
- GameMax RGB 750 PSU
- Viper Patriot 2x8 GB DDR4 memory
- GPU: Sapphire Radeon R9 270X 2GB GDDR5
- T-CREATE PCIe SSD Classic 1TB m.2
To narrow things down I changed to a breadboard build with only the motherboard, one stick of memory, the PSU, and a motherboard speaker for debugging. With this minimal build I get the same results. The board turns on fine without the CPU, but when I put the CPU and fan into the motherboard, it does not respond to power up at all anymore. There are no sounds from the speaker and no lights of any kind turn on.
The odd thing is that when the CPU is installed I can push the "Flash BIOS Button" and the red light there will blink, so there is power of some sort getting to the board still, it's just that nothing else works or responds in any way. Is there any further debugging I can do to figure out what's wrong? Is it likely just a defective CPU that I need to return to AMD?
Thank you kindly in advance for any help,
-k