What is wrong with my Sony-DSC-WX220?

I have purchased some parts off of eBay to fix some broken cameras I have at home. After I replaced the screen and lens of the WX220, I tried to turn it on, but nothing happened. I put a battery in the battery compartment and plugged the camera in, but the screen didn't turn on and the lens didn't extend out. I have noticed that next to the battery there was a dim red light that was on. I don't remember if it was staying on, or if it was blinking, and how many times. I also don't remember if the charging light was on while charging. What could be wrong with my camera? Incompatible parts? Main board problem?

I am not at home right now, and I don't have my camera with me, so I can't see anything else about the camera and add that here. I will add more info in the comment below the question.