I am a longtime TiVo enthusiast who enjoyed the TiVo series 1 and 2 units, before suffering protracted issues with the TiVo HD unit. This is my first time posting a description of my TiVo HD problems on this forum. I've read through a great deal of the 800+ (!!!) posts relating similar problems to my experience, but unfortunately none of the solutions that have worked for others have solved it for me. I'm hoping that someone could still see something new I've missed or have further insight into the problem. Shortly after I started using my new TiVo HD unit, I discovered that programs recorded from certain channels would regularly be distorted to the point they were unwatchable. The breakup in picture would come regularly, multiple times per minute, and would look as if digital static had garbled the entire image, hence the term "pixelation" has been used to describe this type of distortion. During these incidents, the sound would cut out almost simultaneously as well. I found that all the channels that suffered from the issue used a carrier frequency in the 400-500 MHz range. I worked with multiple Verizon technicians to try and identify and fix the cause of the distortions, but the only help they could provide was to verify the signal strength reaching the TiVo unit. I believe I have isolated the TiVo unit itself as the only possible source of the issue by demonstrating the following: A Verizon (Motorola) set-top box simultaneously receiving the same signal can successfully tune the given channel when the TiVo unit can not. A small set of Verizon digital cable channels remain unencrypted and can be received by a digital TV without requiring a cablecard. Some of these channels suffered the pixelation issue, and I was able to successfully tune the given channel with my TV when the TiVo unit could not (either with or without the cablecard.) The problem regularly happens on just one of the two tuners, and this is consistent even after I reverse the order of the two cablecards. By using manual recordings of different time lengths, I can set the TiVo unit to record the same channel simultaneously on both tuners, and only one of the two recordings will suffer the pixelation problem. (This approach has been my workaround for quite some time now.) I have tried to work with TiVo technical support for months on this issue but their effort has been lackluster and unsuccessful. Through the course of the investigation I was able to replace my TiVo unit twice, and all three units have displayed this problem, though which tuner is worse than the other is not always the same. I have tried to attenuate the signal strength reaching the TiVo unit, but no matter how fine an adjustment I make this only manages the degree of the problem and never solves it entirely (for either of the last two TiVo units). I also do not need Verizon's router since I don't normally use any set-top boxes, so I have disconnected that to remove any potential MoCA interference. How is it that I am reproducing the problem so readily at my home on multiple TiVo units and yet this problem does not appear to be widespread? (Or is it, does everyone else just give up?) I am a software engineer, and while I'm used to methodically solving technical issues like this, I'm not used to such a patterned problem not having a logical solution. I appreciate any help that members on this forum can provide.