many users have the problem that their K40 machine destroys itself as an effect of the Moshi 2013 software. But a few days ago someone showed me a fix which could be the solution for the problem in less than 5 minutes!
Initial Situation: after turning on the machine, the motors don't move, machine is not accessible.
You can download the free repair tool on https://www.mediafire.com/?1ho1peojpqejhks
1) Unzip archive
2) Copy the files to: C:/Moshidraw (folder name can vary)
3) Connect the machine with your PC and turn it on.
4) Run the tool (maybe as administrator (right click -> run as administrator)). Wait until "Can Use" is displayed. Then you can start the fix by clicking on "Repair". This takes less than a second.
The machine should now work again. Just restart it. To prevent this damage again, uninstall Moshi 2013 and only use your machine with Moshi 2012!
I tried this with my mainboard, but since I modified my machine I haven't had any possibility to test the board. Please write a short comment if it has worked or not :)
click on repair and......
Success! Now restart your machine