I have a dimension 2400, and the computer takes forever to boot. When you power on, it shows the dell screen that says f12 for boot menu, then it goes to a black screen that has a dash that blinks. It will stay on that screen for 10 minutes or longer. It eventually boots into windows, and runs sluggish. I changed the hard drive, but it still takes long to boot. I reset cmos, and still takes long to boot. Im considering just replacing the motherboard. What do yall think I could to resolve this?