Canon PowerShot S2 IS (READ DESCRIPTION)

Selling a Canon PowerShot S2 IS digital camera. When i first got the camera, it didnt turn on and the battery cover wouldnt open. i got it to finally open and i saw it had a battery corrosion, i cleaned most of it up and i think got it to work because the light is on but the screen would not turn on, i am selling this to people who can fix it and keep or for parts. i am also asking if anybody can fix it for me