I rebuilt mine, do you have the ability to focus manually, as in you are actually able to focus it not just turn the ring on the outside? I missed the engagement of the focus (or was that the zoom) lever the first try at reassembly, fortunately I checked before fitting any more bits!
One of the videos I watched mentioned a component on the circuitry that once touched is screwed, don't know the truth, didn't want to find out! The tea strainer that is my memory tells me it was a component somewhat square in shape and a few mms in size, somewhere near the zoom focal length measuring contacts or the focus motor area?!?!?
Hope you didn't prove that theory right!
A +1 on checking all the ribbons are making good contact.
If you do find the cause please don't forget to let us know what it was!
Hi Forum, first post here, hope you can help please.
I recently bought a 40D on ebay France and the guy gave me an EFS 17-85 free which was showing an error 99.
I sourced a new diaphragm unit and installed it yesterday, felt very pleased with myself. However, it now works but only in manual mode, AF will not register a reading.
Anyone had the same problem? Anyone have a solution please?.
Thanks in advance.
7DII+Grip, 7D+Grip, 40D+Grip, 5D+Grip, EF 24-105 f4L EF-S 17-85, EF-S 10-22, EF 70-200 f2.8 L IS II, EF 2x III, Σ150-500, Σ17-70 f2.8-4 C, EF 50mm f1.8, 550EX, Triopo TR-985, Godox FC-16, Filters Remotes Macro tubes Tripod heads etc!
5D, 20D, 24-105, BG-E4, BG-E2N, 17-85, Nifty 50 pre owned. 😀