Canon 20 d ERR99-

[JuStDaVe]

What is the actual problem with that. ? I know everyone is gettin it but what is canon fixing when u send it back.

Frustrating as i have 20d with err99 all the time
and
Battery grip for it as well.

Also what is the problem with the battery grip ? i seen a few ppl complaining but i have no idea what to tell the shop when they send it away

Thanks

Dave

[Sicily1918]

What is the actual problem with that. ? I know everyone is gettin it but what is canon fixing when u send it back.I've never gotten it -- OK, actually once but that's because I was changing lenses, with the camera 'on', and only turned the lens a little and stopped. So there it was, half the contacts touching the wrong half of the mount -- camera did not like that at all :)
Frustrating as i have 20d with err99 all the time and Battery grip for it as well.Have you tried:

Cleaning the contacts (both ends)?
Using a different lens?
Resetting the camera back to factory defaults and using it that way (just to test).
Not using the battery grip?
Err-99 is a generic error, right up there with "Service Engine Soon" -- the engine's fine, but it could be a cable, a faulty O2 sensor, a faulty thermostat sensor, a faulty spark plug, etc.

[Jon]

Err99 just means the camera's identified that there's a problem, but it's not sure what the cause was. It can be the grip, but it can also be any number of other things, including lens or shutter malfunction, or a battery running dry inopportunely. I got it from my 100-400's IS going toes-up (Canon's fixing it now). If you can clear the error and there's no apparent cause, there's no need to send it back. If you're sure the problem's with the grip, there's a reason to send it back.

The battery grip - there are two specific problems that are being reported (and some grips have neither, some have one, some have the other, and some have both - it's a crap shoot). First, and maybe the commonest, the grip, when there's any kind of torque on the connection between it and the camera, will pull the electronic contacts away from the camera, so the camera momentarily loses power and locks up. There's a fairly simple (and not maybe 99, but not 100.00000% effective) fix for that. I've been able to duplicate this by yanking down really hard on the grip where it extends into the camera's battery compartment.

Second, people see the "low battery" warning coming on prematurely, and may experience the camera going dead when one, not both, batteries run dry. The "Low Battery" warning is premature because putting the battery into the camera directly shows a full charge. I've experienced this problem, and am just hanging off sending my grip in since the first time I spoke to Canon about it they said a firmware upgrade was in the works; last time they said I'eturn both the grip and the camera.