Hi. My name is*****'m a camera repair technician with almost 30 years in the business and I'll be glad to help you with your question today.
It sounds like a shutter failure and actually, it's common with all DSLR's. The cure is to replace the shutter and really isn’t a user serviceable problem. This should be repaired by a qualified technician. You may want to check locally for a camera repair shop in your area, or, if you need assistance finding a shop, please let me know and I'll locate one for you.
If the shutter does not open, there is no image captured by the image sensor and thus, no image displayed.
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