Nad C340 Tech help :)

Hi,

I hope this is the correct place to ask. I've got a NAD c340 amp hooked up with input from my desktop to some paradox speakers, and I needed some audio to test something on my laptop, so I hooked up the input from the laptop to the nad amp, and suddenly instead of a single green light indicating which input is selected on the NAD amp, all of them went yellow. I turned it off, turned it on again, and essentially, all my input channels receive signal from a single source, regardless of selectin "cd" "video" disc", etc. at a very very minimal sound level as opposed to the original. So I can still hear, but not at original levels. Thanks!