See the update to my post above. That was the problem. I changed the /boot partition back to read-write.

Thanks.

Here is that output: pi@raspberrypi:~ $ systemctl status rpi-eeprom-update.service ● rpi-eeprom-update.service - Check for Raspberry Pi EEPROM updates Loaded: loaded (/lib/systemd/system/rpi-eeprom-update.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Sun 2019-10-...

I have just set up a new RPi 4 with a fresh install of Raspbian Buster and PiHole. This was mainly to replace the previous RPi 3B which was my PiHole server. I notice these results from systemctl command and wondered if this indicates a problem: pi@raspberrypi:~ $ systemctl status ● raspberrypi Stat...