Troubleshoot one thing at a time. First, check the jumper as has been suggested, with the power off. Next, remove every module from the bus ribbon cables, then remove the ribbon cables and inspect for damage. If one cable is pinched or shorting, then that will likely be the problem.
If the ribbon cables are OK, then plug back in and then plug ONE MODULE AT A TIME and power test each one. If there is a problem with a module, or the orienttion of the power cable for that module, you'll know straight away when it's plugged in. Test the Elements module last.
Just make sure that you've plugged in each cable correctly, with the -12V stripe on the correct side of the header. Sounds like maybe there's an issue with the power side of the Elements module. Also, keep in mind that a clone might not adhere to the -12v Doepfer standard, so be sure to check it carefully for proper orientation.
"I'll just plug this in here and see what happens."