I have carefully compared the structure of my Rebel T3i camera with the manual. You all are describing something that looks like this:
My camera does not look like that. There is simply nothing like the "Display-off sensor (p.42)" on my camera. Nevertheless, I removed the rubber eye cup and the screen did not come to life.
If anyone knows of a second suggestion, please speak up. Otherwise I am stuck for an expensive repair that may cost more than the original camera.
My rebel T3i screen has gone permanently dark. I do not find a proximity sensor around the view finder on the T3i and no mention in the manual. No point asking about settings because the screen is dark and settings are not visible. Help, please?
My rebel T3i LCD screen has gone black, too. Nothing so far suggested has cured. The instructions for the T3i do not mention a proximity detector above the eyepiece or anywhere else, and I do not find one on the camera. I seem to recall there were LCD indicators in the view-through view finder, but that is dark now too, except for the red focus spots when they activate. What do you think -- is it toast?
OK, I have here the 323 page instruction manual. http://gdlp01.c-wss.com/gds/0/0300004720/02/eosrt3i-eos600d-im2-c-en.pdf#page=319 The index has 10 entries under D, but nothing that looks like "display off sensor." I have removed the rubber and plastic outer viewfinder fitting from the camera, but can find no such sensor. The plastic above the view window is solid and without features. Here is a drawing of the sensor but it does not look like my camera: http://www.manualslib.com/manual/454362/Canon-Eos-Rebel-Sl1-18-55mm-Is-Stm-Kit.html?page=15#manual
Is it possible there was an earlier version of the T3i that did not have this sensor?
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.