Solved: Dual screen - PC to Samsung TV Via HDMI stopped working

Dear All,

For the previous two years I have been running my Samsung TV as a monitor extension via a HDMI cable.

I have recently moved house and rewired my set up and now the computer is not outputting the signal to the TV.

Diagnosis so far:
Tried a different TV - no luck
Tried a new HDMI cord - no luck
Updated video card drivers - no luck
NVIDIA Control Pannel > set up multiple displays > my display is not working > rigourous display detection - no luck

Perhaps I need to check my HDMI output from the computer, maybe an internet wire came loose during moving??

Specs:
-
Intel Core i5 3570K

Gigabyte GA-Z77X-UD5H

G.Skill 8GB (2x4GB) DDR3 PC3-12800 1600Mhz DIMM

Seagate Barracuda 3.5” 2TB 7200rpm 64MB SATA3

Thermaltake TR2 Bronze 700W Power Supply

Cooler Master Storm Enforcer Mid Tower Case

Microsoft Windows 7 Home premium 64-bit

Originally a Gainward GeForce GTX560Ti 1GB GDDR5, this unitburnt itself out so it has been replaced with Asus 1GB dual Cooling Fan GeForceGTX 650Ti

And the TV is a Samsung PS43D450

Please remember this exact set up has been working for two years, and has now stopped after moving house.

Can someone please help?? Thanks in advance!