I have an Axiom 12 purchased in Aug 2017. Worked fine, until I tried this weekend to upgrade the operating system to 3.4.66 (in order to get some new features). I downloaded the software from your web site, put it on an SD card as instructed, inserted into the machine and went through the update procedure. It appeared to go smoothly, and rebooted. The result is, now the machine cannot seem to access the Navionics charts that I put into the SD slot. All I see on the display is the low-res, blocky chart that is built-in. I am using the card that came with it (says on the label: MSD/NEB - 3/R2 US1BZ7ADWl1ISS). I also tried a couple other cards I purchased last month, for South America and Pacific Islands, which previously worked. I power down the machine each time before inserting the chart cards. I saw another thread here that suggested doing a factory reset, tried that but no difference. I also tried re-installing the update to no effect. For reference, the software version that is now on the machine is "AXIOM 12 RV (E70369 0470519) 3.4.66".
I'd be happy to go back to the original software, but I don't have it on any media.
I'd be happy to go back to the original software, but I don't have it on any media.