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The camera hit a splash of sea water and then appeared on the screen a full blue color and then all the information went gradually then no any thing on lcd screen …. note that the camera is working when I shoot from viewfinder and i replacement LCD to new lcd screen and not solved ..!
IBRAHIM V.I.P sounds like water damage to the motherboard since you already replaced the LCD. Use these guides Canon EOS Rebel T3i / 600D Repair to work on your camera. Remove the motherboard and clean everything with 90%+ isopropyl alcohol and a soft brush. Check the board for obviously damaged components etc. If nothing else you can post some images of your motherboard with your Question. That way we can see what you see. Adding images to an existing question
