Prashanth,
Sorry to read that your v6 is not working.? Sometimes it is the simple things that get us.? Are you sure you connected the speaker and encoder to the correct connectors?? Spare connectors on the mainboard are identical to the correct ones.? The two that come to mind are the alternate antenna connection and the Audio connector.? The speaker can be connected to the antenna, and the encoder can be connected to the audio.? Both would cause the radio to malfunction.??
I would suggest you review the assembly instructions here:
Look at the picture in Step 8.? Note the Encoder connection to the Raduino board behind the display and the speaker connection in the upper right (the brown and black wires).
73
Evan
AC9TU