Ok.
Dell XPS R400
The same one that needed a PSU. Got the replacement PSU. Boots up. But, will only work in safe mode. I tried and tried until I figured out it was the DVD Rom drive. Unhooked the drive. There is a CD rom drive too, but it works without removing. So, everything is good without the DVD drive plugged in. So, I try a known working DVD drive. Same thing happens. No normal mode. Just a Cursor blinking at the top of the screen. But, when I'm in normal mode the CD drive doesn't even show up. Nor does any sign that there was a DVD drive. Also, before I can get into safe mode once the drive is disconnected, I HAVE to go intot he BIOS and select "yes" for "Reset Configuration Data." Otherwise, I will get the black screen even with the drive disconnected.
Dell XPS R400
The same one that needed a PSU. Got the replacement PSU. Boots up. But, will only work in safe mode. I tried and tried until I figured out it was the DVD Rom drive. Unhooked the drive. There is a CD rom drive too, but it works without removing. So, everything is good without the DVD drive plugged in. So, I try a known working DVD drive. Same thing happens. No normal mode. Just a Cursor blinking at the top of the screen. But, when I'm in normal mode the CD drive doesn't even show up. Nor does any sign that there was a DVD drive. Also, before I can get into safe mode once the drive is disconnected, I HAVE to go intot he BIOS and select "yes" for "Reset Configuration Data." Otherwise, I will get the black screen even with the drive disconnected.