Weird shutter issue with t2i

[akouvi511]

Hi! 

I have a wonderful Canon EOS Rebel t2i that I just love to death. I bought it second hand and have been using it for the past 6 months. Today, I pulled it out to take a picture and the shutter stuck! This happens on M & Av modes, but not on any of the other & automatic modes. I checked the mirror lock and that's not on.

So basically, what happens is:

Camera focuses, I press to take the photo and the shutter makes it's regular sound and closes... and then does not open up again. There is a red light that blinks, the screen is black, and after about 22 seconds, it re-opens and the photo is over exposed.

What is happening? How do I fix it? How did this happen? I am currently traveling and won't be able to take it in for diagnostics immediately. 

Thanks for the help!

[akouvi511]

Wow... thank you both! You are both right! Thank you so much. Now, to return to the basics so that I don't panic and make a mountain out of a molehill because I don't understand the ISO/aperture/shutter trifecta. 

Thanks again! Very helpful!!