Ensure the24-pin ATX and8/4-pin CPU power connectors are firmly plugged into the motherboard. If your CPU has onboard video, remove the discrete GPU and display from the motherboard's video outputs to rule out GPU issues.
MSI MAG B460M MORTAR Intel 10th Gen LGA1200 DDR4 mATX Motherboard
MSI MAG B760M Mortar WiFi Gaming Motherboard
MSI MAG B660M MORTAR DDR4 LGA 1700 12 13 14 Intel B560 Micro ATX Motherboard
MSI MAG B560M MORTAR WIFI LGA 1200 10th/11th Intel B560 Micro ATX Motherboard
MSI MAG B850M Mortar WiFi Motherboard, mATX, DDR5
MSI MAG B550M MORTAR WiFi AMD AM4
