I am looking for some solution to my problem of one channel cut-off when I turn the volume knob.

My best friend of mine and I we use exactly the same Surface Pro (1) models. However he has been using his connecting audio-jack cable from amplifier to audio-port, and probably damaged or burned out his audio-out on his computer. Do you have any idea how to trouble-shoot it and repair it? Once we tear it down to repair it, we will use the opportunity to replace battery pack too.

So there is no way to replace just touch screen digitizer separate of still functioning LCD screen in 2nd generation NEXUS 7 released in 2013?