Got a weird one here, ram stays on default lights even with psu unplugged!

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In my 30 years building PCs I have never seen anything like this.

It’s 4x Corsair Dominator Titanium RGB DDR5 6600, 48GB sticks. Motherboard is GIGABYTE Z790 AORUS PRO X. PSU is Phanteks Revolt 1200W 80PLUS Platinum. Full parts list here.

Up until about a week ago, everything worked fine. But something changed, and now SignalRGB no longer detects all my ram sticks. Sometimes it detects three out of the four, sometimes it detects none, sometimes it detects 1 or 2 sticks. The sticks that are not detected remain with the default factory rgb pattern.

There are no other RGB programs installed. iCUE has never been on this computer, not even once.

Obviously I want the proper lighting, but more importantly at night I just want them to be dark so I can sleep. Problem is, I can’t get the undetected ram to turn off, not even when the computer is powered off, not even when the I pull the power plug from the PSU! Yes, you read that correctly. With the PSU unplugged and the psu switch turned off, the RAM remains lit for hours and hours. No, this is not a troll post. Here is video.

I have tried holding down the power switch with the psu unplugged and that has had no effect. It has been several hours now with the psu unplugged and the ram is still lit up.

Does anyone know:

#1) How I get all the ram to once again be detected by SignalRGB (this is specifically a signalrgb question)

#2) How I can get the RAM to not light up when the computer is unplugged (this is a general hardware question - obviously there are still caps holding a charge in the system but I don’t know how to discharge them, holding the power button didn’t work)? I don’t want to enable bios erp because I use the pc to charge my tablet at night.

Thanks in advance

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An update in case anyone is having similar issues. The issue of SignalRGB sporadically not seeing my RAM was a hardware issue. I RMA’d it with Corsair and the new kit works great with SignalRGB.

I still have the issue of the ram staying on even when the computer is unplugged, but at least I can mitigate that by using SignalRGB to turn it off before a shutdown. I am still truly baffled as to how this is possible.