My friend has an Acer Aspire 5810TG laptop, Win7 home premium. When he tries to connect to tv via hdmi lead, nothing happens. Have tried the usual, driver updates, messing around with screen res to duplicate monitor etc. When I plug hdmi into laptop it does not detect the tv. Hdmi lead and tv ok as my laptop sees the tv under devices and printers and my laptop works ok. My mate sez it used to work so anybody got any ideas ?