A one year old M1 has worked since setup until recently. When the video signal stopped working, I replaced the HDMI convertor with the until suggested by Slingbox. I have rest the unit several times. I have also set up and reconfigured using the convertor, component, and composite connections. I have also set up with my Directv service as well as with a Comcast service I have. During set up it says it detects a video signal, but then no actual video ever appears. Once set up is complete, I then get audio only with the blue weak or no video signal screen. Is it possible the M1 simply has something wrong with the video signal and needs to be replaced? I have also replaced all cables. Thank you for your thoughts.