Good let us know if the new unit works ok. Sounds like a couple of Intercepts have bad hardware like the moment had issues as well.
Samsung Epic EB13 Deodexed with Genocide Kernel
Samsung Moment DL05 Froyo Port Rooted with MRWRX Kernel 2.0.1 Recovery 3.1.1 and UD4.1
Samsung Intercept (Sprintercept) 2.2
For all your rooting needs. http://www.sdx-developers.com/