Thank you so much for your help. I had the wrong firmware. changing that has the camera now working and I don't need to get a new one (though having looked at spec it is tempting still!)

The internet has lots of annoying icons over it like 'pin it', 'tweet it'. It needs a 'send this person some beer' system. If it had one, I'd be having a good few clicks on your icon.

If anyone else has the same problem, these are the steps put together, that got it all working:

- sudo rpi-eeeprom-update
- If this is the latest then it will cause a problem
- See indilib.org/forum/general/7656-solution-...era-and-usb-hub.html

- Prevent auto-updating of firmware with:
sudo systemctl mask rpi-eeprom-update
edit /etc/default/rpi-eeprom-update to:
FIRMWARE_RELEASE_STATUS="stable"

- Downgrade the firmware following:
www.raspberrypi.org/forums/viewtopic.php?f=28&t=250990
$ unzip vl805_update_0137ab.zip
$ chmod a+x vl805
$ sudo ./vl805 -w vl805_fw_0137ab.bin
$ sudo reboot

- Verify on reboot:
$ sudo rpi-eeprom-update
BCM2711 detected
Dedicated VL805 EEPROM detected
*** UPDATE AVAILABLE ***
BOOTLOADER: update available
CURRENT: Thu 3 Sep 12:11:43 UTC 2020 (1599135103)
LATEST: Fri 11 Dec 11:15:17 UTC 2020 (1607685317)
FW DIR: /lib/firmware/raspberrypi/bootloader/stable
VL805: update available
CURRENT: 000137ab
LATEST: 000138a1

- Downgrade ASI firmware
- Windows required
- Download the firmware upgrade tool from astronomy-imaging-camera.com/software-drivers
- Select the file with the -compatible filename

- In KStars, EKOS, Camera -> Controls, set the format to Raw 8 Bit and turn streaming on
- Monochrome with 'graph paper' overlay?
- Under FireCapture, enable colour with the Debayer function.
- In oaCapture settings:
- Camera: force frame formet to RGGB8
- Demosaic: Demosaic preview and output data, set Bayer format to auto or RGGB8
- You may have to reset the camera or disconnect - connect.

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