What are your system specs...motherboard, cpu, gpu, memory, monitor, psu in particular.
White Q-LED on my Asus B550 board means failure in the GPU during POST.
In my case it doesn't mean the GPU itself is the failure. It most frequently lights if the cable connection to the monitor isn't properly connected. I can imagine it might also light if the DP or HDMI cable isn't adequate for the monitor's refresh rate and resolution.