Hi, I bought the Edifier C3X a month ago as my pc speaker. It was all good until yesterday the external amplifier suddenly turn off to standby mode by itself. I then turn on and it back to standby again within 10 sec. I wait a while and on again, normal and used for few hours it suddenly switch to other input by itself. What weird is it is still functional but all the buttons including the power standby button on the amplifier unit not working anymore. Volume knob still work but other setting can only through remote control. Is it the amplifier faulty?

Guess the bad luck falls on my 1st Edifier speaker.
Do I need to pack the whole set or amp unit only?
Can I speed up the process if I send it Inter - Asia?