Question Newly built pc not posting/no display

Feb 25, 2024
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Im trying to help my brother build his pc and Ive tried every fix for it not posting. (all fan lights turn on and spin including cpu cooler and gpu fans)
Ive reseat the ram multiple times. Made sure all cables were properly connected. Reset the cmos, and yes the hdmi is connected to the gpu. Im not sure what else is left to check. I also made sure that the monitor was functioning by connecting something else with the same hdmi to it.
Mobo: GIGABYTE B550M DS3H AC AM4
Cpu and Gpu : 5600x and 4060
Ram: Team T-force Vulcan Z 32gb ddr4 3200
His mobo has no debug lights either so that wont help
Id also like to add that the mobo box says it is ryzen 5000 ready so im assuming its not the bios as Ive seen that the mobo had compatibitliy issues in the past.
Thanks