When I look at the sd card in windows I can see what looks like a boot partition, then there is a larger partition that can been seen by windows but is unreadable. I presume this is a linux partition not fat32? I get a power and act light solid on my board. nothing on screen. doesn't show up on router.
Though the Pi supports many filesystem types, the most common is called 'ext4'.
Windows does not natively know how to attach an 'ext4' filesystem, but there are a number of free utilities for Windows that do this.
You might try one of these:
And I'm sure there are many others.