Does a TIVO access the disk if it's disconnected from the antenna? Here's why I want to know. I recently purchased my first TIVO - an upgraded Series 3 HD Lifetime. I use it with an outdoor antenna - no cable. The previous owner had no issues with it. But it is freezing on me - won't respond to the remote, and leaves the screen frozen with whatever picture frame was there at the time of the freeze. I must unplug to fix it. It does this on both strong and weak signals. I would like to isolate the cause. My thought is that it's not the too-weak or too-strong signal cause, or fluctuating power since it fails on all types of signals strengths, and it's on a dedicated UPS plugged directly into the wall. I'd like to determine if it's the disk. I ran the KickStart code 54 and it passed, then code 57. It still froze afterward. But perhaps the disk still has some issue that these tests didn't detect. The one condition where it has not failed is when no signal is connected to the input, so that it is always searching for a signal. If it doesn't access the disk when disconnected from the antenna (nothing of value to record, so don't do it), then that would support this conclusion. Thanks in advance for responding to my initial question, or any other suggestions for finding the root cause.