Scott,
Glad to hear you got the machine back together.
Hope is went well.
Can you count the beeps and what is the flashing or steady on?
As most people have said, look for any connectors that are not connected or better yet,
take them all apart and reconnect to make sure they are fully seated.
Other causes of beeps/CEL will be DESS cord loose, and low battery voltage.
Make sure your battery is good, and connections are good clean and tight, including grounds.
Good luck,
kev