All was working fine last night.  This morning switching the telly on to HDMI1 to watch Sky, the TV shows an error message:

Mode Not Supported
Mode is not supported on this TV. Please change the resolution.

Watching Sky through composite out to DVD recorder, then component to same TV is OK.

Have tried the followwing:

• different HDMI port on TV


• reseated cables


• power cycled TV and MySky box, also red button reset on MySky


• there is definitely some sort of signal coming from the HDMI, it is grayed out on the TV without a cable plugged in


• changed HD output settings on MySky to every available option

Anyone else suffering similar problems?  Any other suggestions?
Tonight I will try HDMI out from the laptop to eliminate whether it is the TV or the MySky causing the issue

Setup detail:
Samsung 26" Series 4 450, S/W v. 2010/09/14-001022
MySky HDi s/w v 89.2.5.6.0.145 O/S C021017