Best Buy will not honor their PSP warrenty that I paid over $300 for and they said I need a new mother board for my HP Pavilion ZD7000. The problem is that the LCD screen is blank but the laptop boots up and works fine when connected to an external monitor. They said some liquid was spilt on it and leaked down to the MB but when the screen went out I had not spilled anything on it. It just went blank and that was it. Can liquid permantly damage the MB even though it will eventually evaporate? If I spilled anything (I don't remember doing it) it was a long time ago before the problem started. I would think that any liquid damage would cause problems emediately.