I have an acer aspire idea 500 which I purchased a year ago and was connected to a CRT via SCART. I now have a Pioneer PDP-506XDE but the system refuses to boot when connected using the HDMI lead [even when the Plasma is turned off!]. It does connect via SCART and once booted, I can plug in the HDMI lead and view the Plasma as expected. I have suggested to Acer, that it is a problem with their BIOS but they say 'We are unable to support compatibility issues with 3rd party devices.' and 'We would not be able to provide information on how to update the bios on your machine. If the upgrade is performed incorrectly, this would void the warranty. '