There is a problem with a uSD card you have never used,,
how will it know what ap (access point) and password?
Now if you have a usb->ethernet dongle
I have one, a "9700" (2nd half of usbid)....works fine,
but don't treat roughly, cable is flimsy (I have had to re-solder on dongle board)
OR
get a vt (control-alt-F3) (all this blindly, type carefully, on emmc, no SD card)
login as root
------------------
cd /sys/class/backlight/edp-backlight
echo 3200 > brightness
--------------------
(for some reason, space before and after ">" seems to be neccesary)
OR
try a mrfixit SD, usually reliable
how will it know what ap (access point) and password?
Now if you have a usb->ethernet dongle
I have one, a "9700" (2nd half of usbid)....works fine,
but don't treat roughly, cable is flimsy (I have had to re-solder on dongle board)
OR
get a vt (control-alt-F3) (all this blindly, type carefully, on emmc, no SD card)
login as root
------------------
cd /sys/class/backlight/edp-backlight
echo 3200 > brightness
--------------------
(for some reason, space before and after ">" seems to be neccesary)
OR
try a mrfixit SD, usually reliable