Brand new raspberry pi 4, brand new SD card.
I downloaded and transferred Noobs onto the SD card, booted it, set up Raspbian with no issues, but then it told me to reboot to apply changes.
Since that, it won't boot. I have no HDMI output, the green LED is not blinking and my keyboard and mouse (both backlit) display varying levels of intensity.
I would normally format the SD card but my main machine (Linux mint 19) sees the SD card as 3 separate disks (
I do have another available SD card but would prefer to use this same one - otherwise this hobby is getting a bit expensive.
Edit: I have looked at raspberrypi.org/forums/viewtopic.php?f=28&t=58151
but as my power supply is official and brand new, and everything is plugged in correctly. I also uncommented the line in the
confid.txt file to force the HDMI to safe mode.