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I have a VGC-LN1M PC - on the right hand side is a HDMI select button. This has been activated and will not deactivate. Is this a common issue and howw do I overcome it?
We have seen this a couple of times and, from memory, it has always been necessary to replace the HDMI card.
I am guessing you are no longer within warranty? If not then try phoning one of Sony's Service Partners close to where you live for advice. You will find a full list of Partners in the UK here: -
http://support.vaio.sony.eu/computing/vaio/contacts/asc.aspx?l=en_GB&m=VGC-LN1M