QUOTE (Dr. Zachary Smith @ Mar 1 2009, 05:37 PM)

Franga (Love the name, btw!!!

,
I still reckon someone's moved something. Changing channels on your IQ box wouldn't cause a mess like that. Go through the menu of the tv and select the option that says either "system reset" or "factory default" or words to that effect. Every large set has a control like that and it basically clears any stuffed-up settings and puts the onboard tuner and computer chips back into the state they were in when you pulled the set out of the box.
Once you've done the rest, turn the telly off...leave it fully unplugged for a couple of minutes, then restart it, making sure, once again, that all connections are firmly in place. You'll have to re-tune the thing and reset all the picture settings but I'm willing to bet that things will go back to normal for you. Give it a try...you'll only waste a few minutes of your time...won't cost you anything.

FIXED!
I went to the TV to try what you suggested and could not find a system reset. But going through the menus (which embarrassingly I had been through MANY times since this all started) and I noticed that the brightness, contrast etc were all set to 0 (out of 100). I turned them all up and wouldn't you know it I got picture!
Ohhhhhh so so simple!
Its just strange how it all happened changing channels on Foxtel (via a Harmony 525) and bang all the setting went straight to 0, no fade down (including the sound menu). Hmmm the Harmony must have sent an odd signal to the TV!?!
So Dr. Zachary Smith thank you so much for your help and suggestions, look forward to chatting to you again (hopefully when something does not go crazy!)