Thanks for the suggestions, I only have the one slot, the rest are pci slots, and I even purchased a new flat monitor so all the leads are new and work fine when using integrated graphics chip. I haven,t tried cleaning the pci slot but have tried cleaning the card part that goes into the slot so will try to actually clean out the slot with cleaning solution, as it looks like it will have to be a new mobo I haven,t anything to lose, I have had the computer apart and put back again so many times now so any warranty is well null and void, I keep hoping the dog will pee on it so I can claim from insurance