I like my mish mosh of MIC hi/low and SJP hi/low and circuit. Well this morning I finished the MIC hi/low and I went to SJP and it kept freezing up and I ran upstairs to try on the other dvd player...same thing. Well I'm thinking, 'oh no, will SMN replace it.' I stuck in another workout, but didn't really focu on it cause I was bummed. Afterwards, I looked on the dvd and there was a huge smudge on it. I must have accidently touched it with my sweaty hands. Anyways, I cleaned it up and presto, no problems.:7 Unfortunately, my workout today sucked because of my lack of commonsense. Oh well, at least I am relieved now. I love that hi/low circuit of SJP.