Dear Jani,
Check if you are using USB Hub. If yes, try connecting your USB Cable direct to your PC USB Port. Many Mobiles do not like USB Hubs.
Alternatively, get your cable checked with other mobile too! The cable may be the culprit. Many local made cables show the detection, but fail to communicate.
Third, and likely problem may be yourm mobile communication port may have got oxidized. get it cleaned thro some good private mobile service technician, a LG guys will simply ask you to replace the whole board.
Lastly, check the driver compatibility. This should surely make work.
Hope this is helpful.
Regards,
Mahesh Thakker
Chennai
