Good afternoon everyone.
I have a Mega 2560 (with a RAMPS 1.4 shield) controlling a 3D printer. The board was running Marlin firmware fine - the motors the Mega was controlling were all working as intended. I believe a wire physically pulled a fuse on the shield, and something...bad...happened.
A MacBook (OS X 10.7.5) that was connected to the Mega at the time shutdown (possibly from current rushing to the USB port?). At that point, I could no longer connect to the board using the laptop as a few moments before. I tried another computer (an iMac), thinking the laptop may have been the issue, but there were no devices were created in the /dev directory after connecting the Mega (note: this second computer did not have Arduino IDE installed, but that wouldn't make a difference, unless I'm missing something). I booted my MacBook to Linux Mint, and there were still no devices created in the /dev directory (also no Arduino IDE installed). I ran through the troubleshooting guide, which states:
Make sure there's a bootloader burned on your Arduino board. To check, reset the board. The built-in L LED (which is connected to pin 13) should blink. If it doesn't, there may not be a bootloader on your board.
The L LED doesn't light up when I press reset, but the power LED stays on steadily. Does this mean that the memory containing the bootloader may have been corrupted? Is there anything else I could do to test the board since in will not connect to the computer?
Thanks in advance for any help.