Was the iPad booting up prior to the repair but after the bowling pin damage? That’s an important distinction.
The problem here is that you have a lot of variables, many parts were changed at the same time and it’s never 100% clear if the replacement parts are fully functional or not (never assume they are…). That’s why I ask if the device still “worked” despite a cracked LCD etc. If it did, then you could go back and install the original broken parts (if possible) to see what works and what doesn’t. What you need to do is determine if the problem is with the replacement parts or the logic board.