This seems to have been a problem for many over the last few years and I have read and tried many suggestions without success. It all seems so straightforward: brand new good quality HDMI cable connecting HP pavilion g6 notebook (Windows 10, 64) to Samsung LE37R8 TV. Turn on TV first then turn on Notebook. Cable detected on HDMI-1 but 'No Signal' or (sometimes) 'Mode Not Supported'. Checked Display Settings but 'no other monitor detected'. (Tried HDMI-2 and -3 as well with same result) Am I missing some obvious step?