Meizume M6 dead

Hello all!
I have a problem..
When i bought my M6 everything was alright , i could upload music , but about 2-3 weeks later my computer couldn't recognise it anymore , but it coult charge the battery , just didn't recognise it..
I already tried it with 3-4 usb cables , and on about 5 computers.
When i bought it I could use , so i'm not an idiot..

So about half a year I fed up with it , and tried a hard reset , hoping that then my PC will recognise my M6..
But now when I turn it off it shows a green screen , i can turn it off , and I can hear the sound of the touch pad as well..
But when I plug it onto my computer it still can't recognise it..
Tried DFU tool , and it is not working..
Read all the topics already..

Any help?

I'm sure searching for it probably would have been faster, but here you go: http://www.meizume.com/miniplayer-m6...-not-work.html

Well , that's not the same..
When I bought it It worked , but now it doesn't:-(
I know that the green screen is not abnormal , but my computer doesn't recognise it!