Default [Q] HTC EVO won't power on after battery replacement

So my old HTC started getting the flashing orange light and wouldn't power on. Found the thread that said to replace the battery, so I ordered one and replaced it. The new battery will not charge. I get no flashing LED, no response. I've had it plugged in to the wall, in to my desktop, even got a new charging cable. Nothing happens.

I can get a new internal power board for it, but I want to make sure I've exercised every option before I tear it apart again.

Any insight will be much appreciated!