Sorry i guess i misspoke. Well i did get some output from the line in but it popped a fair amount and only after I pushed the jack in relatively hard. I can't seem to find my quarter inch to headphone jack adapter so ill go get on of those today.

Ill be working on this later in the week. Got classes to work on.

Thanks for the help.

So my friend gave me an amp to fix. As mentioned its the DXB112, a simple 30W combo from crate. 

It turns on, all the lights turn on and the switches react to being pressed but there is no output. I checked for shorts in the input and output and for loose connections. The main power amplifier seemed to be ok. No shorts across certain pins. There is a pop when the amp is turned on and then a pop a few seconds after the power is turned off.

I have some moderate experience with debugging, but am not sure where to take this one.

http://www.crateamps.com/pdf/manuals/DX112212_OM.pdf

Thanks for the help in advance.