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.
ASUS PRIME B360M-C/CSM LGA1151 DDR4 Intel B360 Chipset mATX Motherboard w/ IO
ASUS PRIME H310M-A R2.0 Micro ATX LGA1151 DDR4 Motherboard With I/O Plate
ASUS PRIME Z270-A LGA1151 Intel Motherboard w/ IO Shield | Fast Ship, US Seller!
ASUS PRIME B250M-C mATX Motherboard LGA1151 6TH/7TH GEN CPU DDR4 w/IO- Tested
Bundle of ASUS The SFF-Ready Prime GeForce RTX™ 5070 OC Edition 12GB GDDR7 Graphics Card + ASUS Prime X870-P WiFi AMD AM5 ATX Motherboard, DDR5, PCIe 5.0, PCIe 5.0 x16, 4X M.2, Wi-Fi 7, 2.5Gb LAN
ASUS Prime Radeon™ RX 9070 XT OC Edition Graphics Card, AMD (PCIe 5.0, HDMI/DP 2.1, 2.5-Slot Design, Axial-tech Fans, Ball Bearings, Dual BIOS, GPU Guard)