Computer info: Monorail 8300 Line PC PentiumIII 450MHz... Had two hard drives - one 13GB the other 40GB... 40GB went bad, so replaced it with 80GB. Had (1) 128MB PC100 SDRAM plus (2) 64MB PC100s, but when I replaced the hard drive, I upgraded the (2) 64s to (2) 128s. Tried loading WinXP, but when it tried "Starting Windows" after loading everything from CD, just froze. Tried reinstalling it - nothing... Shut down several times and tried several more times - nothing. Took jumper out to reset CMOS - still wouldn't work. Tried reformatting that drive - still nothing. Unplugged good hard drive (so it didn't get damaged) and still nothing. Now, when I turn on the pc, it just beeps continuously (long beeps)and there is a black screen. Any suggestions/comments???