What comes on, the startup screen ? That's in 800X600 mode. Can you use a different monitor to see the computer program? If XP is having a booting problem, the "startup" screen shows, then starts loading programs. XP could be locking up after that initial screen or the screen driver is corrupt. Try booting in "safe mode - F8" and see if the screen works.
My cintiq 12wx tablet acts very buggy if I attempt to use it with oekaki. A silver circle appears...
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My cintiq 12wx tablet acts very buggy if I attempt to use it with oekaki. A silver circle appears nearly every time I touch the pen to the tablet and circles around my touch point. It makes working with it near impossible. (This is just for oekaki, though I encountered the same problem when I tried to network with a fren and use opencanvas 1.1) I use the tablet just fine with Adobe Photoshop CS3: Love it. No silver circles.