Have a I 4150 for a client . . power seems to cut off unexpectedly . . it will try to boot and sometimes does, but will turn itselft off at different times . . no pattern . . sometimes will stay on for minutes, but never more than 5. . . either on battery or 110v.

 

It has four lights on the right side of the keyboard. . the bottom one flashes briefly when I connect to wall power but does not stay on . . no lights stay on when connected to 110v

 

Anyone have one of these and can advise which lights should be on when it is plugged in but turned off? . . I am beginning to suspect an internal power supply short

 

wrs