1 Copper

RE: XPS 8500 will not start, orange light on motherboard, will not boot, BIOS inaccessible, black screen

Ok, thanks.

My power supply does not have the diagnostics button, only a green light

The power button is not flashing and is emitting a steady white light

I tried disconnecting the HDD cable(s) but unfortunately the screen is black. I don't think the key board or the screen is detected by the computer.