Hi guys! And thanks in advance! =)
Short long story:
I bought Led Lights in Aliexpress for my pc. I tried to install them with the PC turned off. It was a 5050 12 v of my mobo, Msi B450-a Pro (2600 Ryzen, 8GB Ram Predator Hyperx, 2060 Gtx Zotac, etc).
Then i turned on. Everything's go fine...