06-02-2008, 07:14 PM
While you are inside replacing the PRAM battery with a BRAND NEW ONE, you should remove and re-seat all of the cards, cables and RAM to ensure that they are all making good contact. I had a DA that had this symptom and I thought it had a bum power board, replaced it with a known good one and still had the same problem. After re-seating all of the cards, RAM and cables the machine booted like a champ!!