Canon XSI showing "busy" when taking multiple shots

hi, this looks like a memory card problem , format or change card , also ensure that compatible card is used ,

You either have a overheating or a recycle(recharging) problem with the flash. If it is under warranty send it back to Canon, if not I would suggest on investing in an external flash which is MUCH better for wedding photography.

I think it is because the camera has a sensor. The screen turns off so as not to distract you or let light from the screen bother you while taking a shot. You can check this in the manual.

Is the lens aperture ring in the "a"position?

Are you trying to use the flash when you are having the problem? Were you taking a lot of pictures with flash when the problem started? Rapid pictures with flash can melt the flash and capacitors in the camera. Also, a single drop of water rolling around inside the camera in the right place can do things like that. You can try taking pictures in bright sunlight so the camera will not try to use the flash and see if it will work normally, If it does than something is probably fried in the flash system. Bad thing is that if you smelled smoke something is most likely already fried and will have to be repaired by canon. Canons quality has been going down hill for several years now and they have a lot of quality problems. If the camera has been used very little, has never been abused, dropped or wet and not far out of warranty, try using google to see if this is a common problem and call canon and try to get them to repair it for free. If all else fails threaten to replace it with a Nikon assume pay to have barely used camera fixed.

MY CANON GOT WET

use windows search to find all the .jpeg files in your computer. you wil find it surely.

The capacitor in the flash circuitry needs to be charged to a before the flash can be fired. This chargeing time is termed as flash recycle time and duriing this window the camera wilkl show that it is 'BUSY'.

On the back of the camera there is a small button just to the right of the top of the LCD which has what looks like a little clock. Pressing this button will take you through the 3 modes of operation which are:
Single shot, multiple shots and timer. Watch the LCD panel and you should see the icon change when you press the button. When the single rectangle is showing, that is single shot, when it is multiple staggered rectangles that is multi shot and when you see a little clock that is timer mode. Usually I shoot with multi shot mode.