TFT Monitor turns to be reddish after a blackout

I am confused about what could be the problem with it? I first thought it was the VGA cable that was bad but I have tried using different VGA cables but it has not solved the problem. At first the monitor used to work properly but one time there was a power blackout and the monitor switched off abruptly but when the power came back I switched on the computer. Only to find the display colour of the TFT screen had changed to reddish. I tried adjusting the display colours using the TFT buttons provided but it didn’t solve the problem. What could be the problem? Someone with an idea?
