Laptop RAM upgrade (new RAM doesn't work in RVS slot, but works

What is RAM ? 1 ram slot not working If you can use a computer that's in working condition that has the same RAM compatibility (the same DDR revision and a slot that can accept the 168 slot login ASUS Tuf Gaming Z790-Plus Wifi Intel Z790 Lga 1700 Atx Gaming Motherboard with 16+1 Drmos Power Stages, Pcie , Ddr4 Ram Support, Four Slots, USB Gen

128199 slot demo What can I do if only one RAM slot is working? Apply the following preliminary checks before trying any fixes: unplug any external devices