I have the same problem

The shutter flex cable inside the lens is broken. Happens to all cameras from Canon A4xx series. At day the images will be overexposed with horizontal lines on it, but it could look better at dark / night. The FLEX has to be replaced. Canon doesn't supply new flex cables for these, but there are some cheap copies on ebay. But as these brake very often, I wouldn't suggest you investing money in this camera, because it will brake again sooner or later.

White shadow or white lines may occur if the light was too bright when you take the picture, especially in strong sun light. Have you turn off the flash light when you taking those picture ? If you haven't, then you should try to turn off your camera flash light manually. And I must remind you not to take a picture with your lens faced the sun light or other light (lamp etc) directly. Even if you take a picture outdoors, try to make your lens shaded by something, you can even use your own shadow to shade them.

Hope this help and be kind to rate please.
(^_^)

You might have your ISO set too high.

canon powershot A470 problem when i click photo then white image come? but when i use it night it is normal. but during daylight or with sunlight.. white image appear....and every time i take a picture there's a horizontal line appears in the picture..

sdfa

my friend ur CCD is getting weak this is the first sign of the problem when u get lines hor and vertcal and sun light pics are blurred and over exposed after that this problem extends to the indoor shots as well pls confirm it thru service centre for 100% ,

pls do rate me i know it is a difficult moment but i helped u in diagnosing ur problem without wasting time

Try first to reset your camera. Press the menu button, go over to setup, go down to reset, press the right arrow, highlight reset and press set. Don't worry it won't erase any of the pictures on your memory card. If that doesn't work you can try and manually set the white balance on your camera and I would recommend sending it into repairs if that doesn't work since it's taking nighttime pictures fine. :)

I have the same problem have you been able to fix it ?

CCD failure. Known issue apparently based on other posts on other forums and web sites: http://www.nikon.co.nz/pagearticle.php?pageid=2-bdc691bf61

It's either a white balance issue or an exposure issue