When watching back a recording, at a random point during the recording we sometimes get a picture breakup where it's completely unwatchable and sound stutters for around 40-60s before returning and carrying on as normal. We've never seen the same during watching "live" or on-demand programming.
Looks suspiciously like a hard drive fault and it's hitting a corrupted area of the disc. Box was installed in 2011 and has had frequent use ever since, so wouldn't be surprised if it is past its best.
Please could you advise how I can get a replacement TiVo sent out? Is it as simple as calling 150 and requesting it?