RAM SLOT 2 Doesn't work

In this video, we have elaborately discussed which ram slots 1 3 vs 2 4 and different channel

GIGABYTE A520M K Micro ATX DDR 4 Ultra Durable AMD Motherboard with Gbe LAN with Bandwidth Management, Pcie X4 , Smart Fan 5, Anti-Sulfur

ramesses riches slot game Total supports 2 x slots and 4 x SATA 6Gbs ports Intel® H610 Chipset _1 slot , type 224222602280 _2 slot

rambo slot I tried to boot using only one RAM bar at a time in DIMM_A2, DIMM_B1 and DIMM_B2, but the PC wouldn't boot 2 RAM bars, one is DIMM_A1 and one in DIMM_A2 PC