Chosen Solution

My Canon 750D / T6i doesnt recognize my external flash I use Godox TT685C it worked on my Friend’s DSLR I think The Problem is the Hot Shoe Maybe The little piece of metal that hides the Screws is missed.. but it doesn’t affect i tried Godox V1 and TT860 but also didn’t work

I would start by cleaning the contacts with whatever alcohol you can find. Update (10/04/2020) Try:

  • Update camera firmware
  • Reset all settings (maybe some setting is making your flash not work) If that doesn’t help you will have to open your camera to take a look at the connections/wires, for what I see in the picture it has a lot of moisture/dirt that may have creeped inside. https://youtu.be/hpnWB3Yzcac Here is a disassembly guide