Thanks very much for your comments.
I must say, having been a great ambassador of Apple Macs for the past 15 years it is with dismay that all these problems have come at once to my beloved Mac - especially as this was a present and will probably be beyond economic repair.
On the subject of repair, as it seems one or two of you are in the IT business, have you any suggestions on what could have caused this sudden screen failure - it is likely to be the NVIDIA card or motherboard as the internet Blogs suggest?
During the course of the past few weeks the computer has failed to 'wake up' having been put to sleep necessitating a re-boot. No problem there particularly.
However, the last time it was put to sleep the screen didn't wake up at all. I've tried the brightness keys (obvious!) and re-booting from the installation disks but to no avail.
The computer boots as normal, just the screen is dead. As I mentioned before, the hard drive is okay insofar as it works perfectly as an external hard drive with another Mac. I have copied all my data and transferred it to a PC (!).
The Acer I'm using at the moment is fine, but I miss the Mac.
KR
FOK