Oh, right, it's a laptop. With a desktop, there's no cost to replace a card for testing purposes - yay for retail "no hassle return" policies. With a laptop, yeah, not so much.
Do you have the "black screen on start" or the "black screen sometime during gameplay"? If the former, there's no sense in looking for issues with the hardware.
If the latter, a few things come to mind to test.
- Make sure game files aren't corrupted. The "Validate & Repair" of TDM works sometimes, and other times it doesn't. What does work is uninstalling TDM, uninstalling DDO, deleting the DDO folder, downloading the full 5GB of DDO _without_ using TDM, and installing that.
- Check that your laptop fans aren't plugged - dust, hair, &c.
- Check that you run DDO at "native" LCD resolution. Running a higher res, in some cases even lower res, can lead to higher temperature.
- Check the clock of your 9700M GTS with something like Rivatuner. Reference clock is 530 core, 1325 shader, 800 memory. If it's factory-overclocked, clock down to reference clock and try again. [Edit - looks like X305 uses reference clock but is known to have cooling issues, see below] If it's at reference clock, try a lower clock anyway to see whether that helps at all.
[Edit] Check temperature of your GPU when this happens. Rivatuner can display the temp, too. I found a thread of people having issues with GPU reaching 95C and 100C in your model of laptop. They replaced thermal paste to bring it down to 80C and get it stable. Go figure. See here:
http://forum.notebookreview.com/showthread.php?t=328469
DDO is much, much harder on hardware than any other game I've tried, including titles like Batman, Crysis, &c. Combine that with NVidia "Bumpgate" (*), which is of particular concern in laptops due to the thermal management issues, and you have yourself a potential - potential, mind you, that's why all the testing - issue.
(*) Bumpgate - bumps and underfill have different thermal characteristics in a lot of NVidia GPUs, leading to cracks due to thermal stress and eventually failure. NVidia ignored the process directives given to them by the wafer manufacturer, because they, NVidia, knew better. Ho-hum.