In-car SatNav

[Champ]

I have a 2012 MX5/NC Venture edition which is fitted with a Sanyo/TomTom NVA SD8110 system. SatNav shows only "No Maps Found". Radio/CD, etc work fine. The person who sold the car said that the problem first presented itself when the car battery was left flat for a few days. Having tried many recommended solutions without success, I'm pretty sure that, there's nothing wrong with the SD card or the data on it. It seems to me now that the unit doesn't see the SD slot at all!
Could anyone recommend an auto electrician/electronics person who might be able to help?
Ta, C.

[Pops]

Have a try doing this, it seems like you've nothing to lose

Screenshot_20200720_102356_com.android.chrome.jpg

[Champ]

Thanks Pops. I've already been down this road. Sadly my in-car unit does not recreate the loopdir folder.
It doesn't seem to know that it has an SD slot. I'm afraid it's lost its marbles. I'd say it might need a firmware update/reload.
Probably need to go back to Mazda techies.