I think you have corrupted the header data on the card. 2) if the camera has been anywhere too cold, then suddenly warm. Condensation can cause oxidisation barriers on electrical connections. So rub the lens contacts inside the body with a soft lint free cloth and also put it on & take it off a number of times. 1 ACCEPTED SOLUTION. 06-28-2016 12:19 PM. To the right of the optical viewfinder (or in the top-right corner fo the LCD) there is a button labeled "Start/Stop" but notice the ring around the button is actually a swtich which can be rotated to the camera position or to a video position. Make sure the swing is rotated to the camera position. Thoughts on Buying Canon Gear Internationally in EOS DSLR & Mirrorless Cameras 11-23-2023; Canon R8 won't turn on unless I remove/replace battery in EOS DSLR & Mirrorless Cameras 11-21-2023; Canon SX730HS Won't turn on after sitting - new batteries and SD Card in Point & Shoot Digital Cameras 11-21-2023 Using the Self-timer. With this function, images are shot 10 or 2 seconds after the shutter button is pressed. This is useful when you want to take a memorable photo with everyone including yourself in the picture. BTW, this darkness issue still exists on the 6D Mark II as well and is worse on the R6 and R6 Mark II. It's not only the brightness level being too dark, but also the color tones that are not correct. And as described correctly below, only Canon DPP desktop app (current is version 4) will convert the RAW CR2s (6D and 6D Mark II) and RAW or CRAW Best, Andrew. Press the info button until you see the Q screen and it will stay on. It'll save battery if you press the info button to make it stay off unless you hit Q like the other camera is set. When you press the shutter button it'll turn off. But it won't turn off if you press the info button until that screen is up. If a 5D Mark II and using a grip, be sure the grip is tight. If a 1D Mark II, try a different battery or changing the date/time battery. If any of the Mark II lenses, sorry but I don't know how to turn a lens on. If a Jaguar Mark II, wow I wish I had one of these classics! But I fear the Jag had Lucas electrics which are super unreliable. Solution. Consulting the service centers. Please confirm the following items if the camera does not work even if you pressed the button. Cleaning the battery terminals with a cotton swab if the terminals are dirty, and then re-inserting the battery several times. Contact failures may have occurred between the camera and the batteries. KyZv.