Just had this issue last week. Exact same thing. Look for my other posts.
Don’t know which of the following fixed the problem, but I did all of them, and the static is no longer a problem:
1.) I moved the Kona LHi to slot #4.
2.) Reinstalled OS 10.5.8
3.) Donwloaded and installed LHi driver v6.0.5 NDD (Don’t use the other one – it’ll screw up you monitors if you’re using the wrong video card)
4.) Reinstalled Final Cut Pro 6.0.6
5.) Repaired disk permissions on hard drive.
Pain in the butt, but it did the trick. Let me know if you’re successful. I haven’t had the static burst since.
Dave