heloo,,
my arduino uno is detecting as unkown device... i think it might be because of someone applied more volatge to its pinn..but the chip atmega 328p is working.......plz suggest me anyways to work my arduino uno............. 
Loopback test not working either?
ohhhh......i didnt have checked..let me check it first..
i had checked loop back test as mentioned step in forum.....but the same problem occured...... com port does not find......
is therew any solutions that i can get my working uno backk..............plz suggest me..........