Only ever happened to me a couple of times while using the grip and accidentally loosening the 'tightening' wheel. Never an issue otherwise...is your 'power issue' intermittent? I know it's a moot point since it would've needed a repair regardless...just curious.
I had an older EOS lock up and refuse to power on. Resetting the PRAM (pulling backup & mains) and rebooting fixed it both times. My 7D hits 3 years old this oct and has been utterly dependable.
No grip attached. Never had a problem with any other Canon I have used.
Searched the web and tried everything to no avail. I was curious if this was a random issue or a known problem.
EOS 650 had battery contacts go bad multiple times and all my canon camcorders broke in bad ways, so i used to think they had the best tech but worst QC but, knock on wood, I have yet to have had a Canon DSLR failure of any sort.
My, now sold, 5DII refused to power up one day. I was using a 3rd party battery at the time. I have no idea if this caused the issue, but I only use OEM batteries now just in case it did. Who knows They replaced a board, repair was about 200.00.
Oem batteries. From web reports of others it appears to be a power board problem. Hope the fix from Canon is lasting. Anyone know about the warranty period on their work ?
I had an issue with my 7D power. I took it out for my first paid newspaper gig covering a HS football game, and it stopped working, giving me an Err 30.
I stopped using it and used my backup...but the problem never came back. I had a post about it here:
Today I returned home to find my 7D sitting on the front step. Amazing that it was not signature required.
That was the first of several issues that disappointed me with Canon service.
I sent the camera in and asked for it to be cleaned, checked and repaired for the no power issue. This camera has been babied, never dropped or abused. Canon return statement says power board cracked and replaced. How is it possible that a power board gets cracked ? I know it is not a 1 series camera but looking at this issue on the Internet it seems to be a defect on their part and not an isolated incident. In addition, I had requested the upgrade to the locking mode button. I thought since the camera was already in for repair it would not be as expensive. Bottom line, charged flat rate repair and upgrade. Not happy there was not any type of discount. The final slap was they did not even up grade the firm ware. I intend to write Canon and express my displeasure.
Did you receive a quote for the work before you authorized it? You should have been able to tell them "No" on the mode dial repair if it was more than you were expecting. I wouldn't assume anything beforehand.
I would have expected the FW to be updated. My only guess is that they serviced the camera before the FW was officially released, so maybe they weren't able to change it. That's just a hypothesis on my part.
Maybe your power on problem is a known reliability issue within Canon, but if you were outside of warranty and Canon hasn't publicly acknowledged it with a recall, I don't think you have any other options but hope for some random act of kindness from a large corporation. I think most times the consumer loses in that exchange...
My original 7D was one of the first ones sold at B&H so in fairness I should say that maybe the first batch had some bugs. The camera would lose power and would not power up whenever the temperature dropped to 40 degrees F or less. After allot of back and forth with Canon they agreed to replace the camera and the second has worked perfectly. I have heard of a few other 7D cameras with the same problem. If it fails again try to get them to replace it as this problem won't go away. My camera was also out of warranty when they replaced it.
They replaced a board, repair was about 200.00. 