wiggle the ram and see if its fully on while you're comp is posting. Mine for whatever reason snaps in but if its not wiggled afterwords it gets stuck on QR-55. new board to. Sense I've wiggled the dim (noticed its B-2 That seems loose. Push down and wiggle lightly and see if it doesn't help. My issue went away when I did that.
Lian Li 011 Dynamic White Case
Intel Core i9 Coffee lake 9900K @ 5.1GHz
ASUS STRIX Z390-E LGA 1151
Corsair DDR4 Corsair Dominator 32GB (4x8GB) 3600MHz CAS 18
EVGA nVidia RTX 3080 FTW3 ULTRA 10GB
EVGA SuperNOVA 1300 G2 PSU
1x 512GB SAMSUNG 860 PRO SSD
2x 500GB Samsung 860 EVO SSD
1x WD BLACK 2TB 7200 RPM 64MB Cache SATA Hard Drive (6.0Gb/s)