There should be a code on the Q-CODE LED when the system hangs on POST.
Hi and thank you for your answer.
There is no code on the digital screen of the MOBO, it's off and black. The POST does not start. The button power on doesn't respond. I was thinking of a problem in this button but there is also a button START in this MOBO. Nothing happens when I click on it too. I have to clear the CMOS or cut power for 15 seconds for restarting the computer.