Well a few days ago I thought I heard a crack when switching on at the mains and on switching the computer, it got as far as the CD player lighting up then went into a loop doing the same thing...anyway switched off at the mains waited and switched on at the mains and the computer tried to boot without me even switching on the computer.
The situation now is:- sometimes it boots up ok as normal othertimes it goes into a loop as mentioned and eventually boots up but if no one has ever had this problem for an instant answer then I suppose it's all the hassle of trying a spare PSU....of worse horror if the motherboard has developed a fault.
Thanks