I have updated my D500 firmware from 1.15 to 1.20 few days ago. After then, I noticed the OK button is not light up. I turned off, Changed a battery. Still not working. Sent a email to Nikon USA. After two days wait, They forward a answer says my ok button must burned out. But before the update, I had used the camera, It was working as fine as usual. Anyone have a suggest for me to solve the problem?
Why did you update the firmware - what problem were
you having with the camera that the update was to address? I never update firmware on anything without a) a reason for doing so and b) a method to rollback to the pre-update state.
That said, you could:
- Try to do the update a second time
- Try a two-button factory reset
- Find a source for the previous firmware version and attempt to install that
- Send the camera to Nikon for repair
There's much wisdom in the old aphorism:
If it's not broken, don't fix it!