Ubuntu :: Monitor Switches Off After Boot Before Logon Screen?

1. I can run the graphical installer at full resolution without using "nomodeset"

2. I can boot into the Gnome desktop using the option "Try without installing" without any problems

3. When I install to my HDD however, I can boot but just at the point where the logon screen should come(after the black screen,blinking cursor), the display reports no signal and goes to sleep. I can hit enter, type my password, hit enter again (blind, as there's no display) and the HDD spins up as if logging in, but I don't see anything.

4. Using "nomodeset" makes no difference whatsoever other than the graphical installer runs at a lower res.

5. using the alternate installer changes nothing

6. recovery mode has the same issues

It appears to me that booting into Gnome without installing uses some sort of generic driver, whereas installing uses a different driver which is sending my display to sleep. I'm using Ubuntu 10.10 64Bit. Have also tried using 10.04 64Bit and the alternate 10.10 .iso, but to no avail. My graphics card is an NVidia Quadro NVS 295 with a DisplayPort-DVI adapter. I've previously installed 10.04 64Bit on another system with an NVidia GT240 card with no problems whatsoever. I can't try that card in this machine as it's too big for the case chassis, let alone the case.