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EOS40D Error 99 Re-Visited


johnp 10 141 United Kingdom
27 Oct 2010 11:53AM
Two years ago I went on holiday to USA, Fiji and Australia. About 3 weeks in I was shooting away happily with the 40D when for no obvious reason I got Error99. I tried all permutations of switching off/on, replacing the battery, changing lenses and changing the CF card but all to no avail. I tried it a time or two later in the day and on the next day without success. But then three days later it worked and has done so ever since - over thousands of shots - without a hiccup. Until........

I have just been to Australia, New Zealand and Singapore. About 3 weeks in I was shooting away happily with the 40D when for no obvious reason I got Error99. I tried all permutations of switching off/on, replacing the battery, changing lenses and changing the CF card but all to no avail. I tried it a time or two later in the day and on the next day without success. (Does this sound familiar?) But this time I really needed a camera and ended up buying a 2nd hand EOS20D in Auckland. I checked out the websites, cleaned the lens contacts as instructed, but still nothing. A week later it started working again for no obvious reason. Since then it has stopped 4 times with Error 99 but switching off/on and flipping the battery out/in has always cleared it.

It's worth adding that both trips were at a time of year when temperatures and humidity overseas were comparable with those in the UK. All my kit travelled as cabin baggage and the occurrence of faults cannot be linked to flights.

I had a theory that the problem was that some circuit inside got charged up electrically and the long wait of a few days was to allow it to discharge, but that doesn't tie in with the 4 brief events.

Incidentally, since the error message on the camera tells you to switch off/on or swap batteries, why do Canon online recommend cleaning lens contacts?

Does anybody have any theories, suggestions or advice, please?

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KarenFB Plus
9 4.4k 163 England
27 Oct 2010 11:56AM
I put 'Error 99' into the search box (top right) and got these (linky thing) . Are any of these any help? Smile
johnp 10 141 United Kingdom
27 Oct 2010 12:05PM
Nope. But thanks for your interest.
cambirder 11 7.2k England
27 Oct 2010 2:02PM

Quote:why do Canon online recommend cleaning lens contacts?


Because dirty contacts result in Err99. Its not the only reason you get that error code but it is probably the most common on Canon bodies.
johnp 10 141 United Kingdom
27 Oct 2010 4:38PM
My point being that the error message text is therefore wrong.

But what really matters is that Error 99 has occurred several times, but 2 years apart. The killer is that it's only ever happened in Australia and New Zealand ... although I cannot believe that crossing the eqator triggers it!!
John

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