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.
Gigabyte B460M DS3H AC Y1 LGA 1200 Intel DDR4 MicroATX Motherboard
GIGABYTE B760 DS3H AC DDR4 Intel LGA 1700 ATX Motherboard
GIGABYTE B560 DS3H AC ATX LGA1200 DDR4 Motherboard M.2 PCIe Gen3 WiFi Backplate
GIGABYTE B560 DS3H AC Motherboard DDR4 LGA1200 WiFi Card
GIGABYTE B365M DS3H Intel 8th/9th Gen B365 DDR4 LGA 1151 Micro ATX Motherboard
GIGABYTE B560 DS3H AC Motherboard LGA 1200 Intel 10th/11th Gen WiFi B560 ATX
