Problem with speakers

[Max-Powers]

I have a Lepai LP-2020A hooked up to 2 Energy C-100 speakers. This then connects to my devices via headphone jack. I have used this setup for quite some time. I recently unplugged it from my surface pro while it was still on, and it made a pop sound. Oh well, I have done this before, no biggy. Now when I try to plug it into my surface pro, and turn it on, it makes a continuous popping sound. Really fast pops. It is not even recognized as being plugged in. I plug it into my other laptop and it is not recognized. I plug it into my phone (Note 3) and it works fine. I have readjusted the cables and switched out the auxiliary cable.

Can anyone tell me what is going on here?