Canon 1D MK2 - Every other photo is black? HELP

[danrusso]

I recently purchased a Canon 1D Mark II. I had it serviced, picking it up last Monday. Nothing was wrong with the camera. A coworker asked to take photos in the office. He stepped away, returning a few minutes later, asking me if the camera's taking a black frame, every other frame was normal. 

At the time, I didn't think much of it. I thought it was user error. However about a hour later, I tried to take some photos and encountered the same problem. Every other photo is black. The photos which do show up, are clear, well balanced and properly exposed.

So far I reset all custom settings on the camera, and make sure noise reduction was disabled.  So far no luck.

Does anyone know what's going on?

Thanks so much.

[ebiggs1]

Well this will be easy to trouble shoot if it is a mirror or shutter problem.  Set it to manual, remove the lens and watch it.

 You should see the mirror and shutter move.

[danrusso]

I tested the mirror this morning. I shot in both burst as single modes looking directly at the mirror with the lens off. The mirror didn't fail at all. Even when I pushed it in burst mode. It was flawless.

Any thoughts??

[danrusso]

I did just that. I couldn't see anything. I'm stumped.

[ebiggs1]

What about the shutter?  Set it to a slower shutter speed and look.

[danrusso]

I saw the **bleep**ter not rising as much as the mirror. I just brought it in for service. If you want I'll tell ya what they find. The odd thing is they just did a clean and check two weeks ago. The camera checked out. It wasn't dropped or anything.

[danrusso]

It was the shutter assembly. I brought it back to the company who serviced it; and they initially tried to charge me over $300 to fix it. A manager finally called me back and said he would have them fix it.

Thank you everyone for your help.