Canon 50D - Not Powering On

[Joiemagic]

I just posted about an issue with my 1D Mark IV, so I pulled out my 50D backup camera, which I have not used for at least 5 years.  It has been sitting in a camera bag the entire time.  When I charged up the batteries which were totally drained and tried to turn on the camera, I get nothing.  There does not seem to be any power to the camera.  I ordered new batteries and charged them up, but got the same results.  Absolutely nothing, no power to the camera.  I tried taking the battery grip off and using a single battery in, but have the same results.

Any suggestions, please help.  I have a number of upcoming shoots in the next few weeks.

[normadel]

I have a 30D that DOES power up without the CR2016 in place. 

Maybe some Canon person familiar with these things can explain this.

[deebatman316]

Maybe its specific to the EOS 40D I can't really explain it.

[deebatman316]

The power switch is not really a power switch. All it does is report back to the camera that you want the camera off. It's all software not hardware doing anything. The camera doesn't fully turn off. It just goes to sleep.

[Joiemagic]

All I can say is the camera is working.  I can take photos again with my 50D until I get the rear screen replaced on my 1D.  So, I am a happy camper...  Being I did nothing else, what appeared to fix the issue was changing the CR2016 battery as was suggested.