77D Unresponsive LCD and Buttons

[alantour]

Suddenly, when the camera is turned on, none of the buttons work!

Only the mode dial and the shutter are working,

I can't watch the playback and i can't open the menu, non of buttons are responding even the LCD screen

the battery fully charged and the MC formatted in the same camera and i replace the MC (I thought it was from a memory card)
what the issue any one face the same stuck

[Anonymous]

Was the camera dropped or did it get wet?

[rs-eos]

Remove the memory card, lens (re-install the body cap in its place), and remove any additional accessories (flash, etc.).

Then, remove the battery, let the camera sit for a while (a minute should suffice), re-insert the battery and power on.

Is the camera now functioning?  If so, turn off, re-attach the lens and try again.  If all still good, re-insert the memory card.  Should probably reset the camera just in case too.

If the camera still doesn't function after these steps, contact Canon to see about having your camera repaired.