No output to monitor after wooden texture

No output to monitor after wooden texture

I was gaming on a really warm day and left my casing open to lower te temperature inside. Then suddenly some kind of a wooden texture appeared on my screen, I can hear for a couple of seconds the sound of the game before it quiets down as well. When I tried to reboot my motherboard and graphics card would work, but my mouse, keyboard and monitor would not work. ( my mouse usually glows but now it wouldn't )