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Thanks for your reply. Problem solved as audio input chip tape lose the connection at the other side of the motherboard which was not noticeable.

Apologize accepted. I know I am new here and will try to do more contribution in the furture.
Nice to meet you, 1101 :)

Eventually, I found a helpful case in explaining my situation as below linked discussion. However, the subject is not specific and I may overlook it.
Sony Vaio VPCEB2AFD sound is not working...

What do you mean? You are so cruel and rude!
I have been struggling for four days to sort this out. I really have no mean and need help at the moment writing the post.

What do you mean? You are so cruel and rude!
I have been struggling for four days to sort this out. I really have no mean and need help at the moment writing the post.

Few days ago, I opened my laptop Sony Vaio model VPCEB25FG (E-series, Windows 7 Home Premium 64-bits) from bottom to clean the fan’s dust. However, three USBs and Audio output at the right bottom...