I have an ASRock b450M with AMD Ryzen CPU and a Trident-Z. I tried to mount a different DIMM but something went wrong. I powered on the motherboard but the cpu fan just run for half second and then nothing happened. I got same results 3 o 4 time. At some point the cpu fan started running but the system entered in the bios. Mouse and keybord did not work and I noticed that there wasn't power from the usb. So I was stuck in the main page of the bios. Therefore I tried to mount back the old DIMM. However I get same results. The motherbord powers on but I get in the bios main page and the usb ports do not work. The main page tell me that the system properly recognize the hardware. I have cleared the cmos but no results. I cannot understand how it's possible.
Someone have any solutions?