Quote Originally Posted by katt
Hi All...
I am hoping someone out there has some info for me.

I'm shooting with a 10D and have had no problems with it for about 1.5-2 years now. I guess it was time for something to go wrong.

I have the ERR 99 message. I've had it before, but a quick on/off fixed it. Now, it won't go away. I've:
Taken the battery out and replaced (new and old)
Switched flash cards
put on new lens (canon Ls)
used the 550EX flash and the built in flash
shot without a lens on at all

nothing has worked.

Is there anything else I can do and if not where is a reliable, affordable, place in So.Cal. to take it in?

Thanks!
PS I posted before I searched and am going to do that now.
I had this problem as well, showed itself the day of a wedding shoot of all times. Then it spontaneously went away the next day when I tried to fix it. Strange isn't it?