Monitor screen can not appear photos before shooting

I am not sure what is the problem. You say no"picture"..is the screen totally black? Even when you try to preview photos in your camera memory? If so there is a problem with the hardware, LCD screen battery, or some other part.

If you mean you only see numbers and photo setting information on the LCD, that is normal for this Rebel models. The picture only appears in the viewfinder. It does not have a "live view' function to switch the image from the viewfinder to the LCD while you are shooting, as later model have. I have such a model and it is very disappointing.

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It's time to responsibly recycle your old CRT monitor, and spend about $100 to buy a new 17" or 19" LCD screen, rather than spending any money at a qualified TV/video technician, trying to trouble-shoot the problem.

Set the shooting mode to a Creative Zone mode. Press the LiveView button (northwest of the round multiselector). The LiveView image will appear on the monitor.

For full details, see the "Live View Shooting" chapter in the manual.

Be careful shooting this way. Not only will the LCD consume more battery power this way, but holding the camera at arm's length will produce more camera motion than bracing it against your face.

connect external monitor and look it works properly or not .if problem persists , then format and reinstall the' operating system' . use licenced OS(operating system) to install . before that verify that all drivers are present or not . if not , then take the back up of the drivers .

In picture taking mode, press the "set" button for "live view".

There is recall on this model for this problem, Go to Canon USA web site, Look up Service advisory, CCD malfunction N/C to repair.

While you are play backing your photos, press the up or down button untill the shooting information disapears.

change to screen resolution to 32 bit.
to do this, right click on any empty area on your screen, select setting and change the screen resolution, from 256 to 32.

In the menu, under "Image Review". You can turn on and off. Instructions also in the manual, page 144.