Hi Folks, A friend of mine asked if i could help, He has a compac presario f500 laptop 64-bit with vista, He said it was working fine,He came home from work plugged it in, pressed the on button, It comes on for about two seconds then shuts down, I said it sounds like maybe a loose connection, We unplugged the memory cards and then seated them back in, unplugged the only other connection we could find and plugged that back in, still the same thing, comes on for about two seconds then shuts down, can anybody point us in the next step we could take, thanks.