iPod Hi-Fi speaker turns on but does not play music - please help!

Hi there. I recently purchased an iPod Hi-Fi speaker off of Facebook Marketplace. The seller had listed it as working and in good condition, but I cannot seem to get audio out of it. There are no internal batteries inserted and it is plugged into the wall for power. The green light in the lower right corner turns on but when I plug my iPod Touch 1st Generation into the dock, it does not charge. when I tap the airplay button it is noted that my iPod is connected to a dock and the volume controls disappear since the speaker controls take over.

I have an iPod Shuffle that I tried to use through the auxiliary port and that failed to give any playback as well. The light is still green throughout all of this. I do not have the controller to go along so not sure if that has a setting on it that can help me..

If I need to repair this I have no issue opening it up to access the internals. I have done other device repairs before/ soldering so I am not shy to DIY. If someone could maybe know what the internal culprit is so that I can replace the part I would graciously appreciate it.