Initially, my Raspberry Pi B+ was working fine, but after I play with some GPIO pins, I got the following message immediately after the rainbow screen while booting the device.
sh: can't access tty; job control turned off / #
Then, I unplug all the pins and boot it again. Still got the same message. I also added avoid_safe_mode=1 in /boot/config.txt, but still no luck. Then, I formatted my SD card and put a fresh NOOBS on it, but I still see the same message. Any suggestion what other things I can try? Or the Pi has died? Thank you