So, I replaced the LCD+frame and that works fine. I wish I knew what the frame was before I did it though because I think that may be why this function stopped working. Maybe the speaker got damaged transferring it over? I was very careful though. The handset works and I can hear, but it's not the best quality and when I turn on speaker-phone I can't hear anything. I can only hear if I have speaker-phone turned off.

What would cause this? Where can I buy just a new speaker? Or whatever component you folks think is the problem? I know it's a cheap phone and I could just buy a new one, but I like learning how to do this kind of thing. It's fun.

Thank you!