I've always updated drivers using the Device Manager route, (i.e. click on update drivers) and when i did that last night for the graphics card it said it was up to date.
Your suggestion kind of confirmed what I suspected as causing the fault, namely the graphics card, so i went to the nvidia site and got the latest driver and it comes out of stanby OK. BUT, the PC was coming out of standby after a new bootup before. It was after leaving it on standby all day that the monitor stayed blank. So I will try again tomorrow. Cheers.
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