Same problem here but with Intensity Pro (HD version) PCI card.
S-Video connection produce some diagonal interference moire lines.
Tried four different S-Video cables.
Tried turn off from AC power everything in house except PC.
Tried solder 470 ohms resistor to Chroma cable.
Lines have variable direction.
If i instead of S-Video i connect Composite cable there is no interference lines.
Sort of really strange problem. I'll try to attach cooling fan and will report if it helps.
It seems similar problems exists on ATI capture cards.
https://forum.videohelp.com/threads/162 ... ook-too%29So maybe it is possible to isolate or cool some components to fix this problem? Any further suggestions from BM support?
UPDATE: As it was suggested by tramyoung, i place tiny cooler under Intensity Pro board and problem now 99.5% gone. No more diagonal interference moire lines!
Some very tiny flat near invisible amount of pattern is still exists in deepest blacks noise when i increase input gain to maximum level for test purposes.