I just registered to let you guys know i have the same issue.
My LL120 flicker slightly and my h100i turns off for a half second. This happens kinda constantly.
Ive uploaded it on youtube, you can see the light shut down quick at second 2 and the cpu light turn off at second 5.
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Im at work right now, so i cant try your guys solution but if i get it right, i just need to change the theme of the lights?