Originally Posted by
Behemoth
As above yout better off selling it on, your not fit for purpose argument holds about as much water as a leaky tea pot. You could argue that if you'd asked about how long the cables were and was told yes they would be long enough as you relied on the traders expertise (ha thats a laugh experts in PC World) then you could argue the PSU was not fit for purpose.
If you just took it off the shelf, didn't ask anyone about the length of the cables and just bought it then sorry to say you've no rights at all.