Hi everyone, sorry if the post is long. I'll explain the problem to you in the two phases. The first is that the motherboard LED remains fixed to indicate GPU, and in fact black screen, I turn it off/on from the power button and it starts normally. Phase two: if I deactivate the CSM, it does the same thing and I have to do the same procedure, before the CMOS reset, disconnecting the battery, the situation was worse, I turned them off/on several times and on the boot screen, "The GPU is not compatible" appeared with uefi drivers". I hope for a help, thanks.