Hi, I have a desktop PC when I start the power button and turn it on, it turns on and everything without problems at the level of the CPU, the monitor turns on the red LED as if it came to power but does not give me a start image that is to say, turn on the CPU but do not send information to the monitor 'what can it be'

Let's start with the basics: have you tried another minotor? If so, is there any beep at the beginning? This can help to know where the problem is. Is your board Intel or AMD? AMDs tend to fail on the video chip. If you give more information it will be easier to help you. regards