I think that it is powering on but, the monitor doesn't receive any signal and neither muy keyboard or my mouse has power. The first time that I have power it on this morning booted normally but the pc was completely frozen, the cursor moved, but I couldn't click and control alt delete didn't work either, so I power it off and turned back on and now I'm stuck with the problem that I described in the beginning. Note: the bios doesn't beep and there is not usb power or display output. The computer was working normally the day before, I didn't install anything before this happened.