Hi! I am posting this a second time with extra details. I got a nikon F3 which works ok part of the time, doesn't work at all sometimes (only the manual speed lever) and works like batteries are low some of the time (1/80 and down). I tried changing the batteries(2 1.5 pieces) and it didn't help. The turn on\off button shows the red dot so it's on. I used an eraser on the battery terminal. Any suggestions?I heard this happen before due to a defective circuit board - but I expect nikon pro line cameras to be very sturdy so this seems a bit odd.