Camera takes pictures but when i plug it in the computer the lcd goes blank and i cant upload the pics

When did it start?

Did you try re-installing the camera's software?

try the display button if thats not the problem, then ccd lens sensor went bad and need to be repaired by canon http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=183&modelid=14904#SupportDetailAct

That;s what you did.

Since your two cameras have the same problem with the same computer, I would like to suggest you to connect those cameras to another computer. It looks like the problem is on the computer side.

Just take a new one...he...he...he

ugh this happened to me too :( it sucks cuz i have had great pictures i wanted to upload but they wont upload :(

Did you accidentally hit the "DISP" button on the back of your camera? It manually turns the LCD screen on and off to save batteries.

Download the software and then install it once that is done connect the camera to the usb port on the computer it should automatically detect the camera once it is turned on.

software canon

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

I have to say Mac's I know nothing about. But the simple way would be to purchase a universal USB card reader- and use that.