Been in water camera still works but have a blank display

some dry wash lens,display & camera.mother board clean with isopropyl or" petrol.if use ******** wash very good.something heat with mobilephone past.so work it again.harry up in one day or"So4 damage your board.

If your pictures after shoot are coming out well when downloaded , then it is the LCD display - the monitor to your view - that is faulty as the camera section is intact.
So if this comes on and then blanks out there is a possible chance that the Display is faulty, the driver to the display , possible electrolytic capacitors in the circuit or a wiring link to the LCD.
Remove and check only if confident and experienced but do not tamper a working camera.

if shutter is working it is the dfective CCD so replace the CCD.

Press DISP. button, and repeat untill the display shows up

if ur pics are also blank those times when ur lcd is blank then

possibly a CCD failure !

but u are lucky canon is repairing it free of cost just see the link just call them they tell u how to send ur camera dont worry if u are not on list just call them

http://www.usa.canon.com/consumer/controller?act=PgComSmModDisplayAct&fcategoryid=221&modelid=8288&keycode=2112&id=29819

error is generic hardware error. normally some part of the infrared or display has malfunctioned.

Usually it's an lcd burn out where the screen needs replacement. Check the display button if it's just blank then press it to see if it comes on. As far as your friends white screen it not feasible to repair. A good thing to get on any digital equipment is an extended warranty. It does save you in the end when something goes wrong. The limited manufacture warranties are a joke. You should never rely on them.

The Display button manually turns the LCD display on or off to save batteries. If you accidentally had turned the LCD off, It should only take one press of the button to turn it back on and leave it that way. As such, it's not you but the camera. The A570 IS is relatively new. Your camera is likely still under warranty. If so, contact Canon for warranty repair (see the following link):

http://www.usa.canon.com/consumer/controller?act=PgComSmModDisplayAct&keycode=2113&fcategoryid=221&modelid=14905

There should be an option to turn the display screen on/off.