The internal storage controller sits in the front left of this system in a sideplane. Most likely, either the sideplane or the controller itself needs to be replaced. You could also try and BIOS and BMC (DRAC if present) first to see if that helps.

I see several threads looking for XPS 8500 video card upgrades that can be used with the stock 460w PSU or upgraded PSU. However, in upgrading the GPU for this machine, there are some cards that will not be compatible and will result in a black screen.

I want to add an extra drive to my 760 which only has two sata ports. I am using these for main hard drive and DVD rewriter. I need to add an extra peripheral card to drive the new hard drive. I have tried a couple of pci cards with no success.