Well this laptop is having a problem. When you turn it on it won't boot (black screen) and then shuts down then boots up, then shuts down, then boots up and so forth. It has a Pentium 4. I took out a intel centrino chip from another laptop and the Acer turned on and stayed on the screen backlight also turned on but still no image on screen. Now the laptop did not turn on and off but instead you can't turn it off unless disconnect power. Thinking it was a busted CPU I bought a new Pentium 4 but lo and behold I put it in and it went back to shutting off and turning on etc. Is the Mobo dead?