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VIP
Posts: 10,598
Registered: ‎08-13-2015

Re: 70D froze up and now won't turn on after removing battery


@RobertTheFatwrote:

@m0ses01wrote:
Per the canon engineers, there is a usage life on the components in the digital cameras; pc board and shutter. Guess it depends on how much you use it.

The life of a shutter is measured in hundreds of thousands of clicks. The life of the PC board should be measured in decades of use.


It can also be argued that life can be measured in power cycles, too.

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"Doctor told me to get out and walk, so I bought a Canon."
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Respected Contributor
Posts: 1,154
Registered: ‎01-25-2018

Re: 70D froze up and now won't turn on after removing battery

"It can also be argued that life can be measured in power cycles, too."

 

Power cycling (mostly due to thermal cycling) is the root cause of many component failures but typically the number of cycles is extremely high prior to failure however components that run at higher temperature will age more quickly due to the more extreme thermal cycling.  A typical failure of this sort occurs when the connection between the primary chip substrate and the external connector pad (or pin for older non-SMD components) fails from multiple heat related expansion/contraction cycles.

 

But the 70D failure appears to be one or more components that are failing quickly either from self-generated heat or heat from another component and occur at what should be early in the camera life.  These likely aren't from terminal/pad separation but from heat related destruction of the active devices.  But only Canon knows exactly what has/is happening to cause this failure.

 

In cameras with a lot of age/usage that don't fail due to shutter fault are likely to die from failure of one or more electrolytic or tantalum capacitors.  In most well designed electronic equipment failure from these passive components is far more likely than failure from an active device (i.e. integrated circuit).  There was a rash of these types of failures starting around 15 years ago from Chinese sourced capacitors that used a electrolyte formula acquired through industrial espionage but it wasn't quite complete and this problem was well known in the computer industry although other products (large flat screen televisions in particular) were also impacted.

 

Rodger

 

EOS 1DX M3, 1DX M2, 1DX, 5DS R, 1D M2, EOS 650 (film), many lenses, XF400 video
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New Contributor
Posts: 1
Registered: ‎07-28-2019

Re: 70D froze up and now won't turn on after removing battery

You still have the 70D not working?

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Frequent Contributor
Posts: 105
Registered: ‎04-17-2014

Re: 70D froze up and now won't turn on after removing battery

Been there. Send the camera to Canon for repair.
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Occasional Contributor
Posts: 7
Registered: ‎01-01-2014

Re: 70D froze up and now won't turn on after removing battery

Follow  up to my own post:  Here we are three years later and it happened again.  I was ready to give up as the old tricks didn't work.  I called Canon and they repaired it at no charge.  There was a recall due to this issue.  Turn-around was ten days end to end, no charge, not even shipping.  It's worth checking out to see if you meet the criteria if having this issue with your 70D.

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New Contributor
Posts: 4
Registered: ‎06-09-2017

Re: 70D froze up and now won't turn on after removing battery

This is great news! I will have to dig mine of a box.
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