[3 / 1 / ?]
My newly bought B450 MSI Tomahawk doesn't work. After installing necessary components on it and turing on the PSU, no LEDs light up and the PC of course doesn't power on. I checked the PSU on a different mobo and it works fine. However, when pressing the BIOS Flashback button on the Tomahawk, there is a blinking LED light for a couple of seconds. I checked and reseated CPU and RAM multiple times and they're definitely installed properly (I don't have another board to test them on, though). Any ideas?