Please help me, I have been connecting my Acer Aspire 7720G laptop to my Samsung 50" HDTV for the past year with no problems using an HMDI to DVI cable with a seperate audio jack in order to watch movies from my laptop. Then out of the blue, I went to connect it one day last week and instead of the TV automatically switching to the correct HDMI/DVI source channel, the screen just displays the message 'no signal'. The TV always plays a little melody whenever you connect an external source and it still does this, so I can only assume there is nothing actually wrong with the cable as some sort of signal must be going through for the TV to recognise it. It is really annoying!! I would appreciate any advice to help sort this out... My laptop has an NVIDIA Geforce 9300MG Graphics card and is running Windows Vista. Please be gentle with me as I am not an expert in these things