Horizontal Banding and Ghost Images

[moha]

I have a syncmaster t260hd and 2693. I use the displayport for the 2693 and the bvu195 for the t260. Whenever I start using the bvu195 for a few seconds, it'll display correctly, then it'll have weird banding and ghost images. I've searched these boards, and the internet with no solution. I thought it was the usb, so I changed that; I switched monitors, no bueno. I had a rather colorful background, so I changed it to grey, hoping that would eliminate constant rendering, it also didn't work.

I'm on osx 10.6.4 macbook 4,1

If someone could help, I'd appreciate it.