Installing a Sony firmware update
on an alpha a7R III
and other similar series cameras involves downloading the updated firmware,
connecting the camera to the computer via a USB cable and executing the downloaded software.
When instructed to do so, the software does its task, leaving the camera in an updated state.
I need to clarify that last statement: it leaves the camera in an updated state if all goes as desired.
After attempting to install Sony a7R III Firmware v.1.10
, my camera had only a little red access lamp illuminated on the back.
While that was concerning to me, cycling the camera power fixes most camera (and computer) problems and I immediately took that option.
Unfortunately, the light remained on.
Especially with the buggy early firmware of the a7R II, I wasn't worried.
I simply removed and reinserted the (fully charged) battery.
Still, the only sign of life was the red light.
I was leaving for a more than 1 week long photo trip the next day.
I have backup cameras that I could have taken instead of this one, but I didn't have any more Sony cameras and I intended evaluate some Sony lenses while traveling.
Right, installing updated firmware just before leaving wasn't the brightest idea, but things are crazy here and ... that was when I found time to get the task done.
Anyway, what you really want to know is "What should I do when a Sony firmware update leaves only the red access light illuminated on the back of the camera?"
Re-installing the firmware upgrade, potentially multiple times, (usually) solves this problem.
It was that easy for me and hopefully it will be that easy for you.
I don't know why the firmware update failed the first time but worked the second time and that is a problem (and a waste of time and energy).
But, that the camera was working again in a short period of time was ... sweet.
And now, if you experience the same problem, you will know what to do.