I was wondering if someone could try and solve a major problem I've been having with a brand new Arduino Robot (similar to an Arduino Leonardo). Any input would be very much appreciated!
I've been working with an Arduino Robot on a summer internship for the last week with no major problems. However, a couple of days ago, it stopped running programs and couldn't be detected when being plugged into the computer.
When plugged in or turned on, the LCD turns on with nothing displayed on the screen and the power LED also switches on. However, no program is run (I had a working program involving the LCD uploaded at the time it stopped functioning, which would normally run). Also when plugged in, the Arduino is completely undetected by the computer, with the 'Serial Port' option under Tools grayed out, the device not showing up in device manager, and no signs that a device has been plugged-in. I've tried 3 different USB cables - one of which I tested on another device - and 3 different computers (with Windows 7, 8.1 and Linux Ubuntu installed). On the Linux computer, I ran lsusb before and after plugging in the device and saw no change. I've also tried various solutions such as re-installing the drivers and the Arduino software, using MProg and various rebooting/unplugging-replugging variations.
So I think the problem is almost definitely with the Arduino Robot itself. I'll give a little information about the problems I encountered previously, to see whether something I did affected it or not.
The first problem I had with the robot was entirely by my own fault and was pretty foolish of me (I'm new to electronics - this being my first project involving it). I ran code from this website (the first set of coding on the page) to try and see whether I could get the LCD to work - not realizing that it wouldn't work for a different type of LCD. After uploading the code, the speaker made a loud constant buzzing noise. Fortunately after uploading a different code, the problem was resolved. I'm doubtful that this could have affected the robot, but since I'm so new to this I'll leave it to one of you to decide.
The next problem was one to do with uploading. The robot worked fine for a couple of days after the first problem until I came across this one:
When uploading programs, there would be a 'device disconnecting' sound from the computer and the program would fail to upload (I can give details on the error messages if you need them). I managed to solve the issue using an odd solution involving hitting the reset button at just the right time while a program was uploading.
After this, the robot worked for a few hours. In this time I tried to play with the 'turn' function, which didn't seem to work very well at all (the robot would turn angles very different to the ones given) and started creating programs playing around with the LCD. It was at this point the robot stopped functioning properly.
So does anyone have any idea what might be wrong? I have no idea how to fix this problem and I've been trying to find a solution for almost 2 full days now. Any input at all would be greatly appreciated.