Folks, I've a 7937H that turns on and passes diag fine, but as soon as I try to access it, I get a servo error. I suspect the HDA assembly but have no spares to swap to confirm. The entire drive is free for pickup from Rockville, MD. If you want small parts shipped, there will be a charge for shipping and handling... Email me if interested. This notice will be in effect for 1 week Thank you, John Singleton jsk at cimmerik.com (remove all the k's)