Hold on don't send it anywhere until you:
Remove the battery for 30 minutes or so. Make sure it is fully charged and reinsert it.
Use a known good SD card. <----very important
Make sure you go into the menu and set everything back to factory defaults. (Check your manual)
Make sure the dial on the top is set to the green square.
Now try it again!
Flashed orange you mean the light on the front of the camera? Do you hear series of beeps then fast beeping shortly after it snaps a picture? You may have turned on the Self timer feature.
Here's where find some things in the user manual refer to page 87 to 89 how to turn it on and off .. You may also click HERE to view how to work it. Don't worry the link is a Canon website. I do suggest invest on a "UHS-1/Class 10" SD card. " Class # " will it dictate how fast the camera can process and store pictures into the SD card. Anything lower than Class 6 will be too slow could take up to few minutes before you can snap next picture.
I suggest Downloading the manual if you haven't read the hard copy. It will come very handy
Read page 164 how to revert the camera to default settings
I had the EOS Rebel T3 for 3 years now
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.