Minolta Maxxum 7d turns on but shutter will not work (no pictures).

SOURCE: minolta maxxum 7d

http://ca.konicaminolta.com/information/20070202/01_en.html

SOURCE: CAMERA PROBLEMS

This is a known design defect with the 7D - it's called the "First Black Frame". Sony will repair it free of charge.

http://www.dyxum.com/columns/other/First_Black_Frame/First_Black_Frame.asp

Sony will claim not to know what you're talking about, but here's the service advisory to refer to when you tell them it's supposed to be free.

http://ca.konicaminolta.com/information/20070202/01_en.html

They repaired mine for free after some persuasion.

SOURCE: Black images

Hello,
Try to take picture without memory card and observe that still camera goes to Off?

SOURCE: Minolta Maxxum 7D Lithium Battery Replacement

To change this battery you need to dissasemble the back of the 7D, the metal frame behind this one, the front and the right cover and the PCB that support the compact flash reader/writer.
You can see the top of the battery if you remove the compact flash card and look right on top of the connector. The silver rounded portion behind the connector is the battery (5mm diameter soldered on the back of the PCB).
This is quiet difficult job, wit a few delicate connectors, and the flat cable coming from the gyro near the lens is very difficult to reconnect.

SOURCE: BLANK (BLACK) PICTURES

Yes this is a common problem. Set the camera to take a long exposure shot (5 seconds) and with the lens off take a photo. Can you see the ccd or just the shutter (black)? If its just the shutter the shutter is jammed. It's basically a question of persisting with rebooting the camera and taking shots until the shutter frees itself.