I have this old computer i use for playing some games and watching videos, today I turned it on and the monitor never turned on. The motherboard is a MSI P6N SLI V2. All status leds light up fine as always, when I turn it on after some seconds i heard one "beep" as when it boots normally, Windows (7) doesn't seem to start because when i press the power button again it turns off instantly, it doesn't suspend, but that could be because windows got broken after I turned it on and off with the button so much (happened before).
I tested clearing cmos, another vga card, another monitor and connecting the vga to the second pci slot. Also tested removing all the RAM, which causes a very long beep when turning it on, when i insert the RAM again the normal short beep returns. The monitors just stay on "power saving mode" when connected to the computer, doesn't matter if the pc is running or not.
I wanted to assume the mobo died, but the fact that it does the normal "beep" like if it was booting fine confuse me. Could a motherboard fail like this?
Thanks everyone for the replies, it was the vga. I tested a new card and it works. It's weird, I don't see any capacitor blown up, and it never showed signs of not working well, i was using it yesterday without any problems, today when i turned it on all I got was a black screen.