Last week, I came home and there was no sound coming from my Bolt. Also, any text generated by the Bolt was pixilated. I looked at the settings and my Bolt refused to recognize the HD resolutions offered by my TV. I tried to work around the issue and plugged in an external sound speaker, and even that was distorted. After speaking with TiVo (and multiple reboots), they claimed it was a hardware failure, and I went through the whole process of ordering a replacement (and had to pay the charge). Ironically, during the entire time, my TiVo remote box was working fine. Now, almost a week later, the original Bolt seems to be working fine. I'm wondering if this was an overheating issue (as the box was very hot), or if they did a software update, and then a second update. Did anyone else experience this?