Chosen Solution

how to repair my canon 5D mark ll (error 30)

REF: http://gdlp01.c-wss.com/gds/0/0300004270… Perform the steps listed on page 231 of the user manual for error code 30: “Turn the power switch to and again or re-install the battery” (see Pages 26-27 for instructions). This step might need to be repeated a couple of times. Also, notice the advice to use a Cannon lens.