I don't have screen but have the sound through booting

I had problem with affects of water on my Lenovo s6000 ideapad. now the battery is not working but I replaced it with power supply to check it . after booting the system I have the sound but with no picture . I can observe some sulphate pigments on some parts of my sockets and tepe connectors . I tried to remove them by alcohol but still no picture . the affected particles are especially the flat cable between LCD and motherboard and the components like sockets and connectors .I don’t know may be the flat tape is not connecting firmly to socket? some people say that the affects of water will be remained under ICs and sockets and if i can bring back the image ,after a while i will face the other breakdowns so they advise me not to purchase so much on the system.what are your opinoins?