I was wondering if anyone has an experience with following problem..
Canon 7d autofocus doesn't work when used through viewfinder, seems like connection to the lens is somehow disturbed when I move lens AF/MF switch to AF postition. It won't even try to focus (nothing moves) from shutter or AF-ON button, also an aperture blades won't move when depht of field preview button is pressed. I can see and change aperture numbers on display so I think it still sees that lens is connected.
When I flip switch on lens back to MF, I can focus manually (no conf.) and can take a picture. Also aparture blades will move from preview button.
Everything works good when using Liveview.
Don't know about history, got it in that condition. At least looks like new
Basic things already tried:
Firmware update (2.0.6)
Different lenses (all work on other 7d)
Remote control (so not shutter button fault)
Other things done:
Disassembled/assembled few times
Cleaned connectors of ribbon cables of top and middle main boards and the board at the bottom (sorry for not knowing names of all internal components)
Cleaned 2 and 3 pin normal connectors(molex maybe?) on bottom board.
Got about 10 shocks from 300v flash capasitor
Just some thoughts:
If focusing sensor at the pentaprism fails does it affect aparture( or at least preview button)?
If there were poor connection between lens and camera AF wouldn't work in Liveview too?
One thing is still disturbing me.. Firmware was already 2.0.6. I updated it but I used the file that was already on CF card that came with camera (I'm lazy sometimes) so what if that file was broken.. I actually think that camera had problem before that file got there but mayby I try another file once I get camera assembeled once again.
One of the ribbon connectors at main board had quite a lot of oxide on it, I belive I got it cleaned but I don't now is it even related to my problem as I don't have diagrams.
I'd like to hear about similar problems and possible solutions to them.
Also if anyone happen to have a knowledge or documentation to figure out electrical routes inside camera please let me know.
Any other suggestions?