I found this thread to be very useful and one of my D600's now is fixed using the ram module swap. Slot "A" seems to be the bad boy! My dilema is the second unit. All three lights come on and the first light to the left of the "A" light goes out. The other two lights stay lit for several seconds and go out. The lights stay on steady and do not blink. I can get the middle light to blink if I put ram in it, so I know the unit is communicating with the ram. I removed the H.D. LCD BATTERY DVD and ran with external monitor, but same result. I resoldered the DC on the board thinking it was lose, but this did not cure anything. The people on this thread are the best I have ever seen, so I hope someone can help me out. I would gladly pay whom ever finds the solution. Thanks for taking the time to listen to my saga. Thanks Phil

Phil Gibson, June 2009