[pizzaboy192]

If it doesn't show something when you plug it in (with or without battery) then it's probably bad.
I just tested this by pulling the battery from my Fathom and pluggin it into my PC. It tells me that I need to insert the battery.
Good luck finding another Fathom though. They're pretty cheap now, and it's completely worth it.
On a side note, I got a Manilla 2.5 ROM built with some updated files. Still working on it though. Won't have much time until after next week to start again though due to finals.