Pi3r0

Hello again, After a litle exchange with the Corsair support, we came up with a solution. In my case, the issue came from my BIOS version. From the start when I built this PC back in September 2020, the orange DRAM LED on the motherboard stayed on for a few seconds when booting. For months I didn't have any boot issue tho. Until I switched my old keyboard for a K70 Mk.2. And this is when I started having regular boot issues. Where the orange DRAM LED would stay on forever, blocking the boot sequence. But looking back, it seems that the unstability due to the BIOS version (0603) was triggered by any device mounted with an internal memory. I had the same issue with my Logitech headphone. Now that I have installed the latest BIOS version, the DRAM LED does not even turn on when booting. I am now one week post update and not a single boot issue. Plus, the PC boots a few seconds faster now. Oh, and the DRAM LED I am talking about is part of the Q-LED indicators which are not present on every motherboard. And if you do have them, you might not see them if you don't have an open case. Disclaimer from my last post: My memory's drivers were up do date long before updating the BIOS along with every possible component mounted on the PC. Fast boot was on and there was only one boot option possible wich was my SSD. So, the PC should not even have bothered to look for USB drives to boot on. Therefore the "My PC tries to boot on my keyboard" theory does not hold. That's all. I hope this will save someone's time and energy.

Hey guys, same issue here. First, this issue does not occur at every cold boot from me. This is more of a random and annoying event that triggers every 3 to 5 times. I have to precise that I got this issue the first time I plugged the keyboard to my computer and that this computer booted (and still boots) perfectly fine with any other keyboard and without the K70 connected to it. This issue seems to be known for several years now but the Corsair team either does not manage to fix it or just doesn’t care. Which is a shame for a €180 keyboard. For those who might have the same issue, here are some advice that might make your life easier. On my PC, unplugging the keyboard does not fix the problem. I have to switch off the alim to reset everything before booting again. But I have found another way to get the PC to boot which is much faster: Pressing the reset button on my case does the trick. The PC reboots without stopping the fans and all. This is much safer that wildly shutting down the PC by holding the power switch. I have also noticed that this boot issue triggered less often if the internal memory of the keyboard was empty. (Just delete the internal presets on the keyboard and let iCUE manage the lighting). My theories: Today, I have plugged a Logitech G Pro X (headphone) to my PC and it caused the computer to repeatedly boot and shutdown. Only by unplugging both the headphone and the keyboard, I managed to get the PC to boot. The common point of those is that they have an integrated memory. I have read online some posts from people having the same issue which were saying that the boot problem might come from the PC thinking those are USB drives and trying to boot on it. Maybe this is a lead, maybe not. Anyway, I’d like to keep this thread running. I have seen that most of the threads about this boot issue on K70 Mk.2 and K55 keyboards were closed or forgotten for years. This is a shame as no one has ever found a solution. So keep updating plz !