|On the front the green network light is lit, and two numbers 3 and 4 is blinking. After a while the fan is slowly speeding up, eventually to an unnormal high speed.|
No sound when I try to hit any keys (even when I hold down a key for a long time).
Sometimes, the computer starts up normally. One time, it started up normally, and windows loaded. I logged on my user, but before I got to start any programs, the screen turned black, and the NUMLOCK light on my keyboard went out (this was lit), and everything turned to the state as described above. Normally, I don't even get the startup screen from bios.