Hi Steve,
Below are the instructions for the microSD card re-flash. I have included a weblink to the Brennan website instructions which provide the download links for the B2 software and the 'balenaEtcher' app.
If you do this and get the B2 up and running, then try some powerdown and power up cycles. If the SD card becomes corrupt again then I would suspect that the B2 hardware is faulty. I have 2 B2s, one about 4 years old and the other is about 5 months old. I do quite a lot of software testing on these which involves many power down and up cycles and I have never yet had a corrupted SD card, so this should not be happening on a normally functioning B2.
Regards,
***** Note ---- these instructions are for the later B2 model (post March 2017 approximately) which has the microSD card inside the case.
The instructions for the early model B2 (pre March 2017 qpproximately) are slightly different as the SD card is directly accessible from outside the case.
The microSD card rebuild process is reasonably straight-forward to do, although it looks a bit scary when you look at the instructions. Below is a link to those instructions. Look in the left hand panel of the webpage and scroll down to 'New SD Card'.
There are two download links in that webpage; one for 'balenaEtcher' and the other for 'B2BNOV2019.zip' file. These are all you need to rebuild your microSD card.
The 'balenaEtcher' is the software program that is required to flash the microSD card.
I have boiled the instructions down into a series of summary steps below, which might be of help to you.
You will need a USB - microSD card adapter if your PC/Mac doesn't have one fitted.
1. Download & install 'balenaEtcher' onto your PC/Mac.
2. Download 'B2BNOV2019.zip' to your PC.
3. Power down your B2.
4. You will need to open the B2 unit (on the back panel, remove the two upper screws marked with a chevron (^) symbol.
5. Plug the new microSD card into PC OR use the existing microSD card that you have just removed from your B2.
6. Start up 'balenaEtcher' application on PC.
7. Select 'Flash from file' option and select the location of the 'B2BNOV2019.zip' file. (DO NOT unzip the file).
8. Then click on 'Select target' button and select the microSD card as the target
9. Then click on 'Flash'
It will take 'balenaEtcher a few minutes to flash and then verify the microSD card.
10. On your B2 install the newly flashed microSD card.
11. Power up the B2.
12. Check the software version which should show as 'B2B Sep 06 2020' (or similar).
13. Run a 'Web Upgrade' to further update to the latest software from the Brennan website.
14. Reboot the B2
15. Run a software version check - should now show 'B2B Nov 2 2020' (or very similar)
So from a bare microSD card to full upgrade should take approximately 20 minutes to complete.
Regards,
Peter.