Sometimes computer doesn't bootup

Leblob wrote: Ryzen 1600 2060 RTX ASROCK AB350 Pro4 2x8 2400 Sometimes when I try to startup my computer or restart it the fans and LEDs turn on, but the screen stays black without even showing the bios screen. The solution is to hold the power button down and turn it on again, hoping that it will work on the next try. The times it works and doesn't is almost random but it happens multiple times a day. Another issue that is less common is when I turn off my PC from windows but everything in the computer still runs with the LEDs and fan. And if I remember correctly the lights on the motherboard DO NOT turn on during the fail boots.

Sounds like DDR4 not set correct to the motherboard and CPU, I think specifically CAD_BUS, hence I recommend you use Dram calculator and go through the official steps recommended by 1usmus = https://www.techpowerup.com/review/amd-ryzen-memory-tweaking-overclocking-guide/

Also the procODT is very important to get correct.

If both CAD_BUS and procODT are on botherline, then it will exactly happen as what you wrote, sometimes ON sometimes no ON. On some PCs it would beep warning 3 times then boot. Also a setting mismatch as CAD_BUS and procODT in bios. I think.

Welcome any other gurus to fill in the gaps.

Ryzen 1600
2060 RTX
ASROCK AB350 Pro4
2x8 2400

Sometimes when I try to startup my computer or restart it the fans and LEDs turn on, but the screen stays black without even showing the bios screen. The solution is to hold the power button down and turn it on again, hoping that it will work on the next try. The times it works and doesn't is almost random but it happens multiple times a day. Another issue that is less common is when I turn off my PC from windows but everything in the computer still runs with the LEDs and fan. And if I remember correctly the lights on the motherboard DO NOT turn on during the fail boots.