EOS 40D Won't Power Up

[robinkaspar]

I have a 40D I haven't used since I bought a 70D when it came out. The 40D has been stored in my bag in a closet without a battery, CF card, lens (body cap only), without anything that could render it useless. I brought it out of storage (not a hot attic, etc) in preparation to donate it to a worthy cause. It won't power up with the original Canon batteries (fully charged according to the original Canon charger). I bought 3rd party batteries which won't power it up. I bought a charger for those batteries and still the camera won't turn on. I can't think what else to try. My plan was to format all the CF cards I have and donate them along with the camera. It looks perfectly normal, the battery contacts look clean. What do I do with it? I don't want to invest any more money in it. 

[Canjunpharoah]

I have a similar problem. My 40D has not been used in years and was trying to get it up and running again. I tried all these steps replacing the 2 batteries and the memory card and still cannot get the 40D to power up. Any ideas on what to try now?

[lafrost30]

I am in a similar position with my Canon 40D. New batteries and charger bought and tried; replacement date/time battery bought and tried but still nothing.  What is the next thing to try, please?

[LeeP]

I had completely forgotten about the date/time backup battery given that my Canon XSi and T3i never once failed to power up. I passed both along with some EF lenses to a buddy that wanted to get into photography. I figured he could knock around with the dinosaurs a while until he got a sense of what he wanted to do before buying an expensive camera and then growing tired. The cameras have been a good catalyst for him. I will tell him that if they have this issue that I have a possible solution or two. Great thread to all who participated.

[John_Q]

Hello lafrost30,

I'm sorry to hear that your EOS 40D will not power up. 

Please make sure that you are using genuine Canon accessories for powering the camera. Also, make sure that all compartments on the camera are closed securely. Please check for debris inside the battery compartment where the pins are located and check for debris on the metal contacts on the battery pack. You may use a dry microfiber cleaning cloth to wipe the contacts. Try the camera with just a fully charged battery, no lens, memory card, flash, etc. Is the unit still not powering up? Unfortunately, that would mean there is a problem with the camera. 

I've reviewed our service information and Canon no longer provides repairs for the EOS 40D. This camera is considered 'Out of Service Life' and parts are no longer available. I apologize for any inconvenience this may cause. You do have the Canon Upgrade Program as an option. The Canon Upgrade Program option allows you to replace your current equipment with a new or refurbished Canon unit at a discounted price. If you would like to take part in the Canon Upgrade Program, please call our Sales Department at 1-866-443-8002 from Monday - Friday between 9:00 am to 9:00 pm ET and they can help you with availability and pricing.