It sounds like what you are running into is SOC, which is Selectable Output Control. This would provide audio only, but no video when you have an HDMI cable plugged in due to the software (SOC itself) being activated within your Set Top Box by either your cable company or the Set Top Box manufacturer.
As you said, the only way around this would be to completely remove the HDMI cables and replace them with Component, which will give you the same high definition content.
I hope this helps!!
You were right,i remouved completely the hdmi cable and everything is
2015-04-11 16:49 GMT-04:00 Samantha.Sling <firstname.lastname@example.org>:
Hi,Need info, new with slingbox m1,canno't look my tv channels on my
laptop or android tablet, i must dicconnect the hdmi cable to view the
tv,ihave only the sound.I want to know if it is theway it works?
reply from Samantha.Sling
in General Slingbox M1 Questions - View the full discussion