I had a look online a couple of days ago to find some articles on TiVo repair. I expected to find quite a lot but to my surprise there was not many at all. I guess this is a good indication that TiVo PVRs are very reliable.
However, if you have been having any problems with your TiVo then you might want to take a look at this little troubleshooting guide from weaknees.
This is a neat comprehensive list of the most common problems and hardware failures you can have with your TiVo PVR; it lists the possible causes of the problem and the solution (if any).
Be aware that opening your TiVo voids your warranty.
