Solve : Laptop Fails to Boot?

1.	Solve : Laptop Fails to Boot?
Answer» I upgraded the RAM in my LAPTOP and now when I attempt to power on, it won't boot. The power led comes on and the optical drive led comes on but not the HD led. It will spin a CD but won't boot from it. I put the old RAM back in and it does the same thing. Also, I changed the little round internal battery as the clock had been resetting every time it was turned off. Maybe I MESSED up the bios when I took the battery out? It was working fine before I messed with it. It's about six YEARS old with an Intel Centrino cpu and running XP. Any THOUGHTS?

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