I have been using my D300 for 7 years without a hitch. Last month I was changing my 18-200 to my 70-200 2.8 for more light and when I switched back my 18-200 I could no longer take photographs. I tried the 70-200 again but the same error code showed up in the top screen (no lens) I took it to an authorized Nikon repair shop in St. Petersburg FL. and after three weeks he tells me he doesn't have any idea what's wrong with it and to send it directly to Nikon Factory. Any ideas?
Any ideas? Yes. Not an expert by any stretch. If you look inside the camera body at the very top you'll see 8 contacts. You may have at least one that has corrosion or oil, etc. that is preventing contact with the necessary lens information and shows as if you have a non-CPU lens attached. I would try to clean all of these contacts with something like DeoxIT (RadioShack) and then retry the lens. You may also try a total reset of the camera, but I'd try the clean first. Hope it works!
Thanks for the information on cleaning the contacts with DeoxIT. I had cleaned the contacts with alcohol but it didn't have any effect. I went to Radio Shack and purchased the DeoxIT and rushed home and used it and a miracle happened.It Works!!!
Sorry to hear of the problem with your D300. First as Leo recommended, I would check the electrical contacts on the camera body and the lenses. Make sure all of the electrical contacts on the lenses are projecting out the same distance. They are spring loaded and can get jammed in, that could cause the problem.
According to the Nikon USA site, there are No Nikon Authorized Repair Stations in St. Pertersburg FL. If the contacts look ok and using DeOxit doesn't solve the problem, Nikon Service in Melville NY should be able to get it fixed.
btw alcohol tends to leave a film when it >evaporates. Contacts need to be wiped off after using it.
You are correct in that 'rubbing alcohol' (mainly isopropanol) can leave residues. People need to be aware that they need to check the list of ingredients on the container. Pure grades of isopropanol contain nothing but isopropanol (isopropyl alcohol) and usually a small amount of water. These do not leave residues. Generic rubbing alcohols can and often do contain additives along with water such as oils waxes and fragrances and these will leave residues.
The electrical contacts on the lens are spring loaded. If they all project out the same distance, it would not be the cause of your problem. Sometimes one of the electrical contacts will pop out though that is rare and very unlikely to happen to two lenses.
Neil Rothschild (nrothschild) had an electrical contact on his D300 camera body erode enough to prevent the camera from communicating with the lens. He included some images. If you search the D300 forum, you can compare it with your D300. (I would post a link but I am posting from my phone.)
The first item I thought of when I started reading your query were the contacts in the camera: Are they all properly in place and free of oxidation or contaminants? Then I read that you had already taken the camera to a repair shop and they couldn't find anything. Since I believe they *should* have checked and cleaned the camera contacts as one of their first attempts to troubleshoot the problem, I sure wouldn't have much faith in that particular repair facility any longer. As already mentioned in another response, apparently there are no Nikon authorized repair shops in St. Petersburg, FL but, even so, after hearing your description of the problem any repair facility should check the electrical contacts for oxidation or contamination whether they are authorized by Nikon or not. They had your camera for three weeks and found nothing and you fixed the problem by using the first recommendation you got from Nikonians -- not a great performance by the repair shop.
Glad to hear the Deoxit worked for you and your camera is back in working order.
You all have been a wealth of information and I really appreciate it,But this morning on a shoot I decided to use the D300 and when I took it out of the case it would not work. (Just my luck). I fiddled with it looking in all directions when I turned it right side up it said the battery was dead. What gives? I just put a new battery in it last night plus I have the MD-10. I replaced the battery with another fresh one and it read full charge but, still no lens recognition. I went to put it in the bag and when I set it down I looked at it before putting it away and it was reading 3.5. You've got to be kidding me, I've got Gremlins? This is too much I'm going nuts I've already been without my Digital for 3 weeks and having to shoot everything with my Hassy has been a pain cause I don't have a good selection of lenses. What up with this, Has anyone ever heard of anything like this? This camera has never been dropped,rained on,misused, or abandoned, I've always treated this camera with love and respect. HELP!!!
Sat 25-May-13 05:00 PM | edited Sat 25-May-13 05:03 PM by LeeSyl
I found a post by a person who had a similar problem to yours on the Dp ProDX forum from March 30,2008 - not sure how to link it directly. What this person did was to reset custom banks shooting and settings and it worked for him. He did this on the advice of Nikon techs. He claimed that he was told that somehow the camera's computer became 'confused'. Try a google of Nikon online/phone tech service, a standard camera reset or a full reset. Batteries - Are these batteries of yours the authentic Nikons?
Interesting that the DPreview article also involved zooms....Wonder what the 'wonder shop' might have tried on your camera during its three week stay.