...a repair may be worth it. I think I'll call ATS & ask...
No luck there. ATS doesn't work on them. In fact, he said that they don't even work on the HDD-200.
So I'll keep my eyes open for another. In the mean time, I may mess around inside this one a little more. Ya never know, the problem may be something as simple as bad pin connections between boards or something. Probably not, but there's little to lose for trying.
Cheers