I'm confused.
Thought I'd try John's suggested method at top of thread, a few error messages, few reboots, then this:

Rebooted with <SETUP>+<MIC>+<EJECT>, RNS-510 won't boot, has error message that it wants the SWL disc, insert disc then this:

I chickened out and cancelled, because there had been so many error messages getting that far and I didn't want to end up with a bricked RNS-510.
Maybe it would work if I tried again?
My RNS-510 does not have setup menu enabled. So I presume the correct steps to follow are per FJ Steve + edits:
Setup, Eject and Star, forces the unit to go into a FW downgrade mode when next you insert a FW disc. To do this right....
1. open car, leave keys in pocket.
1a. start up the RNS by pushing the volume button in, wait for boot to finish?
1b. force downgrade mode by pressing all at once <SETUP>+<EJECT>+<MIC>
1c. wait...??will reboot automatically or needs to be restarted menually
2. start up the RNS by pushing the volume button in, wait for boot to finish?
3. Press all at once <LEFT ARROW>+<RIGHT ARROW>+<info>
4. Unit will go thru a reset stage, and will (after a few minutes) re-start.
4a. Unit reports something...
5. Insert your .iso disc that you have made from this thread.
6. Unit may report "Unable to read CD/DVD", BUT, let it go......it should go through a firmware install process.
Does that sound correct??
Thought I'd try John's suggested method at top of thread, a few error messages, few reboots, then this:

Rebooted with <SETUP>+<MIC>+<EJECT>, RNS-510 won't boot, has error message that it wants the SWL disc, insert disc then this:

I chickened out and cancelled, because there had been so many error messages getting that far and I didn't want to end up with a bricked RNS-510.
Maybe it would work if I tried again?
My RNS-510 does not have setup menu enabled. So I presume the correct steps to follow are per FJ Steve + edits:
Setup, Eject and Star, forces the unit to go into a FW downgrade mode when next you insert a FW disc. To do this right....
1. open car, leave keys in pocket.
1a. start up the RNS by pushing the volume button in, wait for boot to finish?
1b. force downgrade mode by pressing all at once <SETUP>+<EJECT>+<MIC>
1c. wait...??will reboot automatically or needs to be restarted menually
2. start up the RNS by pushing the volume button in, wait for boot to finish?
3. Press all at once <LEFT ARROW>+<RIGHT ARROW>+<info>
4. Unit will go thru a reset stage, and will (after a few minutes) re-start.
4a. Unit reports something...
5. Insert your .iso disc that you have made from this thread.
6. Unit may report "Unable to read CD/DVD", BUT, let it go......it should go through a firmware install process.
Does that sound correct??
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