iPod Screen Will Not Turn on. Sleep/Wake button is Stuck

I have an Apple iPod 3rd Gen that has a stuck sleep/wake button on the top of the device. The button will not spring back and I know I will need to open up the iPod to take a closer look. The big problem at the moment is the screen has stopped turning on at all. I can connect the iPod to the PC and iTunes will be able to access the device and the music and the movies on it. What I would like to ask is do these symptoms sound like a screen issue or logic board issue? Not sure how to proceed.

Thank you