My Series3, which is now... going on 6 and a half years old, seems to be having a problem in its growing age. However, this is a weird one. I replaced its hard drive about 16 months ago, when the original 250 GB hard disk it shipped with up and died. I purchased and installed a WD Caviar Black 1TB SATA drive, and used an InstantCake CD to install a fresh software load on it, because I'd never backed up that original drive - oops. Since that time, it had been fine. However, a couple days ago, it developed a new quirk. When watching two different digital cable channels with the two CableCARD S-Cards I still had in it, I would get massive breakup on both, whether they were being recorded or not (obviously either way, both streams get spooled out to disk). However, if I switched one tuner to an analog cable channel, and the other to a digital (HD or not) cable channel - no breakup. I haven't yet cracked my S3 open again since this happened, but I never enabled any of the AAM stuff on the new drive, so I can hear it running. It's not annoyingly noisy, but it's the familiar drone of a hard drive. This has not changed. (I'm familiar with the noise of a failing drive.) I could also watch an already-recorded show - no breakup. I had bought a refurbed Premiere XL last fall, so I decided to take the plunge and move the XL into primary service, swapped out my two S-Cards for one M-Card, and now the XL is up and running happily. But, for the moment, I still have active service on my S3. I connected a Mohu Leaf antenna to it, and tuned two different digital OTA channels. Guess what? No breakup. Anyway, my main question is this: Could this be caused by either a failing capacitor related to the CableCARD controller chip, or the chip itself? Or could my cableco have pushed new code out to the aging S-Cards that made them not play nice together on a single host? I don't really need more than one TiVo for myself, so I'd like to sell off my S3, but it's not lifetimed, and I don't want to sell it and claim it's OK if it's not (even though other than the oddness with two digital cable channels, it seems perfectly fine). Has anyone seen this sort of failure mode? Edit: I popped the case on mine, and on the power supply board, the capacitor marked C701 (a fairly large radial electrolytic cap) is visibly bulging, but I don't see any signs of the electrolyte leaking. Could that do this?