Things had been doing fairly well until last night. Weather outside was great, not a cloud in the sky. Two programs started recording because a timer was set. About 20 minutes into recording I attempted to watch a recording in progress. It was nothing but a black screen. I stopped the recording and went to the channel and still had a black screen. I attempted to navigate a channel up and down and they were black. Inwent to a prime time channel and it was fine. I reset the HWS and all the channels came back.