In reply to a post by ian72:

Will be difficult to track down without any indicators of what is failing. Your only other option would be if you have a local IT place that might be able to do some swap out testing using spare parts. If they do it for a reasonable price it might be worth it (depending on how much the PC was in the first place).

I know that Novatech provide a service like this and have a few stores around the country. Personally I wouldn't go to PCWorld but that is an option.

This is the problem with all in ones, they are all nice and dandy when the are working, but a pain in the neck to sort out when they don't.
I know someone who got a Lenovo one as well and it is a nice machine, but I dread it going worng as i will be the one that will be trying to sort it out.

I suppose the same is true with laptops