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VIP
Posts: 8,059
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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"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Reputable Contributor
Posts: 521
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 M2, 1DX, 1D M2, EOS 650 (film), many lenses, XF400 video
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?

Frequent Contributor
Posts: 73
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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