(In reply to johnrory.odwyer from comment #12)
> Often when I turn back on the system it just goes straight away to a black
> screen. It doesn't even go the the Dell boot menu that gives the bios options
> etc. The card would seem to be alive. Sometimes in this situation I get a
> beeping sound from the hardware.

That sounds like a hardware / BIOS issue. That's before the Linux kernel is
even loaded.