here is a little background to my proble. I bought a new sony dvd burner today and I was going to simply replace my cd writer with this. I hooked it up as instructed. Very easy. Just hooked everything up the way the cd drive was. I then went to turn the pc on and it started to boot then went to a black screen with a blinking cursor in the top left hand corner. I tried it a few more times and the same thing. I then took the pc apart again thinking I had the dvd burner hooked up wrong. I then turned it on and it booted up to the desktop fine. I then messed around a little with software and when it asked me to reboot I got the blinking cursor thing again. I have had the pc apart several times and every once in a while it boots up fine. I have cleaned it out fairly good and tried to tighten everything in place. Yet it still wants to boot to the blinking cursor, most of the time. I have tried to put the old cd burner back in and its the same thing. I have looked everything over and I can't figure it out. Any ideas? The pc is an older emachines desktop model #s1940. about 4 years old. I am operating windows xp. I have reordered start up in bios to hard drive first. I have taken the floppy drive right out. Still blinking cursor on start up.