DRAM LED on

Hi,

I have a MSI B450 Tomahawk Max and 2 8gb sticks of eam group Vulcan Z T-Force.

My brother recently swapped our RAM as he wanted to test the differences and when I reinstalled my memory, everything lights up and powers on except for the fact that the DRAM LED stays lit and I can’t get onto windows, BIOS etc.

I have removed the sticks, cleaned them and reinstalled them and nothing so far.

Any help would be greatly appreciated.