Suddenly, my laptop started to have problems booting. When I press the power button, it starts to power up, but quits after a few seconds (3-5). I can hear the drvies/fans start to spin up, and then it just powers off. The initial screen displays for about .5 seconds -too fast to read any messages. I have it configured to boot from a CD/DVD, so I tried that, but it didn't work either - UNTIL - I removed the hard drive itself. Now I can boot fine from a bootable CD (typically a LINUX Live CD). I even replaced the HD with a new one, but its doing the same thing with the new drive. Any help would be greatly appreciated. The laptop is an older HP zt1000, long since out of warrantee. Thanks.