10-24-2017 09:01 AM
Sounds like the orientation sensor is stuck/malfunctioning.
Try swappting LCD again. If that doesn't work remove battery and re-install.
If no luck give Canon a call at 1-800-OK-CANON.
02-01-2018 06:07 PM
You may fill out an online repair request form at the following link to setup your repair using our online service.