I'm trying to connect my desktop speakers to my laptop and its not working. Im connecting the speakers from speakers input cord to the laptops headphone connection. Headphones work fine when plugged in so I have no idea why the other speakers aren't working. Also the speakers are amped up so It should just amplify the sound.
A 3.5mm jack is a 3.5mm jack regardless of desktop or laptop. It's designed as a audio output not specific to headphones or speakers as it's the same exact signal and power. Make sure it's not in the mic slot instead of the speaker slot. Check to see if the correct sound device is selected.