Problem with my camera

[Thanaboon Jearkjirm]

Today I noticed a yellowish banding withing some of the shots, so I put up a white piece of paper and do some testing. I got the following results.
I'll probably send the camera in for service but curious what might be the cause of the problem, the shutter, the senor???

D700
Manual, f/2.8 at 1/1000s

for bigger picture of each images
http://www.flickr.com/photos/lunnj2/6064903507/
http://www.flickr.com/photos/lunnj2/6064903501/
http://www.flickr.com/photos/lunnj2/6064903497/

[Thanaboon Jearkjirm]

There was no yellowish banding this morning when I took the pictures outdoor, hmmmm, maybe it's my lighting inside the room. Need to do some more checking...

[Thanaboon Jearkjirm]

Foolish me, it was the lighting in my room and not the camera... but that's a good news for me.