My Compaq Presario 700US laptop will not start. Power light (green LED) comes on but nothing else. Worked fine until the other day. I think it may be the CPU (AMD Duron) or the MB as it will not post at all. I?ve swapped out the memory, so I have pretty much ruled that out. Also, I have tried to power up with the battery and plugged into an outlet and still nothing although power indicator is lit. Anyone have any experience with this model, as I?m ready to scrap it if I can?t get it working.