The camera body seems to power up fine, but there is no display on the lens (through the viewfinder) and it wont take any pictures. It seems that the lens is not receiving power and/or not communicating with the camera body. I have tried two different lenses, both have the same problems.
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Turn the aperture ring to its smallest setting (largest f/number). You control the aperture from the camera body, as on a lens without an aperture ring. Turn the mode dial to M (manual). The camera's exposure meter will not work with this lens. You can use another lens to get an approximate exposure, or take pictures and review them and/or use the histogram to fine-tune the exposure. The camera won't autofocus, of course, but the in-focus indicator in the viewfinder will still light up to indicate proper focus.
Hi tin_080 ,theapertureactuatingleverwas bentorloose andisaheadof the control mechanismofthediaphragmopeninginthecamera body. Checkthis:point thelenstowards younotice thatthe diaphragmis closed. To avoidmorecostlydamageyou take ittoa workshopforservicing. Best regards
Sounds like a loose or poor connection of the screen's flex cables, a very common problem for your model camera. The A630's vari-angle screen is a great option for a camera, but with this moveable screen, the screens data and power cables can and do wiggle loose. It is actually relatively easy to fix by just reseating these cables, but will require opening the back face of the screen of your camera. Please see this other person who had a similar problem.
try cleaning the contacts on the bottom of the lens, where it mounts to the camera body. This is a simple step to take and one that I try to remember to do frequently when I am switching back and forth between lenses frequently. get a magnifing glass and look closely at the contacts on both the lens and body. I have 5 canon bodies and the 75-300 IS lens is one of my favorites. It is ALWAYS mounted on either an XTI or XSI and within arms reach at all times. I have a hook and hang it from the headrest of the passenger seat when driving so that it is always ready at a moments notice. I have never had a problem with that lens.
Maybe you drop your battery and they have electronic components inside that could be spoiled, if is that the case, try to change the battery, it appeares to me that the ammount of current the battery is sending to the component is very low even thoe it seems to be fully charged that's why the camera is unable to display anything and the "busy" warning is blinking all the time, I hope you find this usefull.
Then you learn, when everything works fine, dont mess with it! Have a look at the gold pins that rely the body to the lens. Also check that your lens manual switch focus is engaged... Try a friend lens to see if its your cam or the lens...
That would explain the darkness if the lens is stopped down. It would seem the aperture control is faulty on the camera body. Normally, the aperture remains open until you take the picture. It is only closed down while the shutter is open.
Notes on G-type Nikkor and other CPU Nikkor lens
The G-type Nikkor lens has no aperture ring; aperture should be selected from camera body. Unlike other CPU Nikkor lenses, aperture does not need to be set to minimum (largest f-number). CPU Nikkor lenses other than G-type Nikkor lens have an aperture ring. Set the lens aperture to its minimum and lock. When the lens is not set to its minimum aperture setting and the power switch is turned on, "fEE" blinks in the control panel and viewfinder and the shutter cannot be released.
Sounds like you may have a problem in the auto iris curcuit or the auto settings was switched to manual and the lens is closed. Check first to see that the lens is setup in auto mode. If it is then the auto iris as i said before is bad or stuck closed unless the small caps in that curcuit went bad as they always do after a few years. Good Luck